Stupidity: During one of the test drives, the hook that Hiccup uses to fasten himself to Toothless gets bent, so he takes Toothless to the blacksmith to cut the line. There are two ways he could have easily avoided this: He could just unhook the saddle, take that to the blacksmith and cut himself loose, or he could just untie the leather strap. What he does here is needlessly risky and just there for his awkward conversation with Astrid.
Stupidity: When Greg volunteers to watch the security monitors to see if the creatures can affect people through a screen, no-one even thinks to remain in the room with him to cover up the monitors with a blanket, towel or something similar in case the creatures' power can be transmitted that way. They tied him to a chair to reduce his chances of committing suicide, so they certainly thought there was a possibility that he would be in danger.
Stupidity: Spoiler. The protagonist is a trained and competent nurse, paired with one of the greatest murder mystery writers. Neither finds strange in the slightest that after jabbing his vein with a dose of drugs 30 times the norm he is absolutely fine, not just conscious but even able to concoct on the spot a convoluted plot, speaking normally and quite at length, no trouble at all. He should be dead "in 10 minutes" sure, but it's not a time bomb. You'd think one would not be so blasé about slitting their own throat and the other would have to notice how amazingly unaffected and lucid the other appears to be minutes later. Not to mention that his plan would have never worked with the toxicology report, which should be routine in a suicide case also to assess the mental state of the person who left no note or anything behind.
Suggested correction: It is explained that the drug overdose will kill Harlan in 10 minutes based on the dosage. The implication is that Harlan's heart will stop, not that he will become gradually and obviously sick over those 10 minutes. Regardless, based on what they believe will happen, even if they did notice that Harlan wasn't getting sick they wouldn't have the time to test that theory. The fact that neither Marta nor Harlan thought about a potential toxicology report is a pretty major part of the plot, and it is perfectly reasonable given the circumstances. The plot was hatched on the spot within a few minutes and there are several holes in the plan that drive the story throughout the film. Although a brilliant man and a great writer, Harlan simply didn't think of everything.
She explicitly says "You'll feel symptoms in 5" and when he shuts her up putting a hand on her mouth she says "We have 6 minutes."Then his daughter interrupts them and more time is wasted. By the time when he begins his convoluted explanation of the big plan he should have already been disoriented, sweaty and the whole gamut leading to his respiratory failure. And he goes on for minutes after that. It's very true, it moves the plot along, but by what they say themselves (which is from I understand not medically accurate and contradicted also by what happens later in the movie with the second death) they should have realised that time has passed with nothing happening. You could even say it's Rian Johnson's intentional deconstruction of the artificial nature of the whoddunit contrivances! But also, just saying, one of those "Stupid actions and decisions people take in movies, which no-one would ever do in real life."
Even taking that into account, what you are saying is Harlan should have said "Hmm, a few minutes have passed and I haven't felt any symptoms, so I'm not actually poisoned. Carry on then, false alarm." It moves the plot along because Harlan isn't willing to risk Marta getting in trouble for poisoning him and they have less than 10 minutes to act. This would count as a stupidity entry if Harlan didn't care about who took the blame for killing him, but obviously he does. Remember, stupidity entries are not for poor decisions by characters, they are for minor plot holes. This being "an act no-one would ever do in real life" is kind of the entire point of the movie. Nobody believes Harlan would do this because, well nobody cares about their nurse that much. But he does.
The part I was quoting is the description of the category in the metadata on google, or if you prefer the hover text description just above this very page go by "Something just plain stupid. Not as deal-breaking as a plot hole, but something daft, like running upstairs with a killer behind them, instead of out of the front door." I call "slitting your own throat feeling totally fine after you yourself have been calling the minutes with precision earlier", pretty silly, to say the least. Again, this is all stuff the script itself unnecessarily calls attention on. If he didn't mention twice the time before, if she hadn't said that the symptoms happen after 5 but just "your heart is gonna exploded at the 10 minute mark", then, maybe, I would have simply reported the factual error that this is not how it works. It's the script itself that points out (Harlan himself says it twice) the exact minutes, and the symptoms and how they are gradual.
This still ignores the fact that they don't have time to test the theory. They would have to notice the lack of symptoms, and assume somehow that the lack of symptoms after 5 minutes must mean that Harlan isn't actually poisoned, and stop their plan right then and there. The audience knows that Harlan isn't really poisoned, but we don't find that out until later. I doubt very seriously that anyone watching this film for the first time believed, as you suggest, that Harlan obviously wasn't poisoned because he didn't show any symptoms and it was therefore stupid for him to kill himself. It seems to you to be stupid in hindsight, but I honestly don't believe, based on what the characters knew, that Harlan's action was so egregious that it constitutes a mistake in the script.
We definitely had a very different impression watching it the first time. The thought that this old man could be shot a big dose of morphine in vein and calmly think of perfect murder plans for the next minutes was 200% absurd on first view here. I could say that others thought the same but it's just anecdotical and I respect you having a different take. For the rest, it's again just the script itself drawing attention to it. From the mouth of the same character who nonchalantly slits his own throat feeling still fine. It seems egregiously stupid and contradictory.
But he wasn't shot a big dose of morphine. He got his normal meds, they only think he overdosed.
We don't know that yet. We know that, in their words, he was shot 100 mg instead of 3 (does not matter if true or not, we are fed this information and the characters believe it). Again, the whole scene would have worked if they didn't, themselves, add details. Makes the overdose sound huge, and inserting the 6 minutes mark (which means, barely 1 min till the symptoms show up) before the daughter arrives when more than half of the scene has still to be played, weakens it terribly. Some things are maybe just stupid in hindsight, like the fact that all he needed to do was to write in his own penmanship a suicide note saying he killed himself with an injection once Marta left, but the overdose bit felt absurd on first viewing.
Stupidity: The lack of security at the château is not plausible. The Germans typically would have layers of protection around headquarters or other sensitive areas. In the movie, there are two middle aged guys guarding the road into the Château. After that there are no checkpoints, no patrols, and no controlled access points into the castle. It makes no sense that dozens of officers would be left vulnerable to an attack by French resistance fighters, let alone an Allied airborne assault.
Stupidity: Why does the team choose to enter the shimmer from Area X and then trek for miles to the lighthouse? They could travel by sea and stage an amphibious landing on the shore right at the foot of the lighthouse. Obviously this would make for a very short movie, but this choice still needs to be explained in the plot.
Suggested correction: I thought it was an obvious tactical choice to go by land. If the mysterious shimmer radiates in all directions for miles, as it seems to in the movie, then it would also radiate for miles out to sea. A recon team is going to have a lot more options to deal with any "weirdness" on the ground rather than on a boat or in the water. (Also, the book "Annihilation" on which the movie is based makes it clear that there are some really big, nasty things swimming around in the water!).
Stupidity: The 1st time Foley enters the warehouse with the woman, 2 guys enter with the wooden box and black bags on top to transfer the bonds, then take it back to the truck. Why enter the warehouse at all when they could've put the bonds in the bag anyway, inside the van? They had no reason to go to the warehouse at all. (00:42:20 - 00:43:25)
Stupidity: There's no reason whatsoever for Mr. Walker to trash the other rooms of David's partners. Someone as tough-minded as Mr. Walker would have been able to recognize the consequences of his behavior. He could have simply trashed David's room and let it be. It simply seems like a plot device to justify David's gang attacking the Walker residence.
Stupidity: In the first game of the season, Pete makes a tackle on a receiver and causes him to fumble. The play results in a scoop and score, only the Titans player who recovers the ball runs the wrong way.
Stupidity: When Laura goes back to the house to get her bag, she takes off her wedding ring and flushes it. Problem is, she knows how her husband is and doesn't take the time to make sure the ring goes down! But she makes sure there's no other trace of her being there (flushing her hair down the toilet and drying the floor off from her wet feet!).
Stupidity: Oldboy finds the right Blue Dragon restaurant that the prison uses. But him running after the delivery boy doesn't make sense. How does he know the delivery boy is going to the prison? He knows it's the right takeaway, but that's all he knows. So, would he have a moped, bicycle, or car ready to use surely? The takeaway is a long way from the prison (as he says himself in narration), so he wouldn't just wait around for a moped delivery to run after, especially as a good chance he wouldn't be able to keep up.
Stupidity: The type of steak that Clyde demands has a sharp kind of bone inside that can easily be used as a weapon. No prison would be foolish enough to overlook this fact, especially as the warden had everything double-checked.
Stupidity: They say the airline industry was the perfect way to transmit the virus but how would the plane even fly if there was an infected person. In one scene the plane crashed within a minute of an infected person being on it.
Stupidity: When the army base gets overrun the girl jumps on a soldier and starts biting his neck. The woman soldier that's with him aims her gun at them but doesn't shoot, knowing full well there's no hope for the man. There is utter carnage going on all around them and instead she tries to help him and gets attacked in the same way. This could be a plot hole as well as the girl in question is the one that holds the key to survival.
Stupidity: When Roy finally gets to the Lima project in the shuttle but can't dock, he just lets it drift away - he could have at least tethered it to the station to use it for his return trip.
Suggested correction: There is no way to know the reason why he did this. It's plausible, or even likely, that the pod was out of fuel. Not only that, but it could not dock with Lima because it was damaged, so it's likely that the damage played into the decision as well.
Stupidity: Adam, Hannah, and Megan [sitting in SUV with flat tire] saw the Man flashing his headlights, getting out, kicking his own SUV and ranting while holding a machete. Instead of fleeing, they got out of their SUV and saw the Man was wearing a welder's mask. When they returned to their SUV, they didn't lock the doors. The Man ran over, pounded on the front passenger's window and then opened the door. He stabbed Adam 36? times while the two girls just sat there screaming and one said, "Please stop."
Stupidity: The whole premise of the plan is summarized by Helen in the sentence "They don't know Andi is dead, so why would they suspect anything?" However, "they" conspired in unison to financially ruin her sister, and "they" did not answer the mail, none of them. The possibility that "they" all could have gathered and silenced her by force is one of the most likely ones, and yet neither she or Blanc consider even for a moment that the literal crime conspirators could have conspired.
Stupidity: When an explosion hits the courtroom, Arthur is the closest person to it, with nothing to protect him, but he is the first and only one to recover, and every bailiff (not to mention the police outside the courthouse) outside of explosion range is mysteriously knocked out and/or absent.
Stupidity: The team can hack security cameras and gain access to Pam's laptop easily and load the image they want on her screen, but then have to email it to themselves for some reason rather than just transfer the file directly via the connection they already have to her machine. Ridiculously insecure and an unnecessary step.
Suggested correction: You're not wrong, but that segment is far more flawed. In reality, hackers never use the "remote desktop" technique, which has high bandwidth overhead and would require constant distraction of Pam to prevent her from noticing the blatant intrusion on her screen. Real-world hackers typically open a file-sharing connection to analyze the victim's PC, avoiding any interaction with the screen, mouse, keyboard, or email address.