Stupidity: The bad guy's henchman has a plan to stop XXX from reaching the wagon with the President. He hides in the kitchen compartment, which is in a separate area that XXX has to decide to look up and get inside of for no reason (guess that looking at Ice Cube he guessed he'd be going for a snack at some point), leaves his automatic weapon on the floor and just waits there in a ceiling compartment with a knife. If he just shot him through the wall or the door, I guess it would have been too easy. (01:26:20)
Stupidity: When he's using carbon monoxide to poison the corrupt detective Frank Masters, the windows in the car were operated by the key fob. Unusual, but OK. Maybe. But the detective could've simply opened the doors after McCaul left him in there. The door worked when he was forced into the car. (01:24:30)
Stupidity: Paul Manfield (Arthur Pope) and his family have been hiding from and eluding the FBI for fifteen years, but Paul gets so intoxicated one night that he loudly sings "Pretty Woman" walking toward his house - where neighbors could hear - and yells that he is not Paul, he is Arthur Pope. (00:52:18)
Suggested correction: People do seriously stupid things when they are drunk, and Manfield/Pope is very, very drunk.
Stupidity: Noah chases one suspect while Leslie chases the other two. Noah eventually pulls out his gun and says, "Stop, police!" Leslie doesn't even try to draw her weapon until she hears sounds from the nearby brushes - but she barely has her hand on the holster when she turns around and gets punched in the face. Leslie is knocked over and the other man she was chasing repeatedly hits her in the face, quite hard. Her injuries could have been avoided simply by having her gun ready to aim and use. (01:04:48)
Stupidity: Glenn's house is next-door (with not much space between) to Susan's. Christina's bedroom window is opposite Henry's bedroom window, but both 11-year-old classmates do not close their curtains (leaving space in the middle between the panels). Furthermore, Police Commissioner Glenn Sickleman - suspected of abusing Christina - does not bother to close Christina's curtains when he goes into her room to abuse her! This enables Henry to suspect (possibly KNOW) that Glenn is abusing Christina. (00:18:20 - 00:19:06)
Stupidity: When Joaquin was running from Cornell, he turned into an alley between buildings. He was to the left (of the screen), which was unobstructed, but ran to the right, so he could jump over boxes. Cornell could have also stayed to the left, but ran far enough to the right where he could kick the boxes out of his way. Easily avoiding the boxes would have been faster. (00:11:37)
Stupidity: The villain has a couple dozen able men fully equipped with lights (plus vehicles, obviously), but instead of using them to run after the kid who has a minute tops head start on him and is running blindly in soaked mud fields on her little legs, he uses his manpower to clean up the road from blood, spikes and various other traces of the precise location of the shootout. Rather pointless move since the feds are gonna come anyway in the area because of the communication loss with the convoy, with a decent approximation of their position. It appears unbelievable that he would have his priorities so wrong and just leave the girl to run free like that.
Stupidity: Wouldn't it be common sense to have more than one remote to control Robo-Cain? That way, if he destroyed one (and he did), they could still use one to shut him down from a distance (as long as they can dodge the gunfire).
Stupidity: Dirk squeezed a long stream of lighter fluid onto the pile of Mario's clothes, then saw a necklace, which he removed (and potentially got lighter fluid on his hand while doing so). Instead of tossing a match from a safe (r) distance, Dirk crouched next to the saturated clothes and held a match near the bottom of the pile, risking burning himself. (00:06:40 - 00:07:21)
Stupidity: The Mother who got engulfed in flames from the car crashing and exploding on impact with the van stood around flailing her arms and swinging her purse (also on fire) instead of doing what "everyone knows" to do: drop and roll. (00:12:19)
Stupidity: The first time they see the bad guy in the Land Rover, Morgan has him in his sights but can't shoot, as he doesn't want to kill him. Clearly, the obvious thing to do is to shoot the car tires, but he doesn't and lets him drive off.
Suggested correction: Shooting out car tires is not an actual effective strategy to get a vehicle to stop. A 9mm bullet simply doesn't cause enough damage to a tire to get it to go flat immediately. It causes similar damage as running over a nail. It is a movie cliche, similar to using a gun to shoot out a lock or a rope, it just doesn't happen in real life.
Stupidity: When the duke approaches the wall at the end, Snake dives on him and briefly knocks him out. Snake could have easily grabbed his gun back and left the duke unarmed (or even just killed the duke there and then), but just gets up and runs, leaving it with him.
Stupidity: So if Harley Quinn drove the truck to blow up the plant, wouldn't she have had to drive through all the cop cars at the bar murder scene? We know it was the same street because the cop gives the necklace to the detective. (00:10:58)
Stupidity: Angela ran over to her neighbor Mr. Charlie when she heard him come home. Angela was complaining that his son and friends make too much noise, do whatever the want, are bringing property values down, act wild/crazy, draw attention to everybody, and she doesn't want the police coming. These may be legitimate complaints, but the way Angela expressed them would bring down property values! Not only was she yelling in the street, she used "m-f-ing" several times, as well as other select words. (00:02:35 - 00:03:07)