Plot hole: The policeman survives a frontal crash into the hillbilly's truck at full speed without as much a scratch. (00:24:40)
Plot hole: The scene takes place in Julia Roberts' father's stable. Mel Gibson explains to Julia Roberts that he was supposed to kill her father, a judge, because he was going to reopen a certain case. Gibson says that he couldn't kill him and they became friends. He further explains that he was the one to talk her father into reopening the case in the first place. The problem is, they didn't meet until after he decided to reopen it, since that was why Gibson was supposed to kill him in the first place.
Plot hole: Part of the reason that the Jackal killed Lemont, asides from him being very annoying and money grubbing, was the fact that he wasn't going to give up the blueprints and plans for the device he made for him. Made a big deal about how he had to turn it over, and he tricked Lemont into going out into the testing ground with him so he could kill him. Then in the next couple scenes, the FBI is investigating Lemont's warehouse after they find Lemont's body, and Delcan finds the plans for the device Lemont bluilt for Jackal. This makes no sense. The Jackal was so adamant about getting those plans back, and even killed Lemont over it, it's just baffling to think that he would not have returned to the warehouse to get them after disposing of Lemont. Not doing so lets the FBI find it exactly as shown in the film. The Jackal is show to be very intelligent and has been doing this line of work for 20 years. And as Declan says, he's not inclined to make mistakes... Especially a mistake like that. (01:02:35)
Plot hole: In the scene where Lewis and Clark nearly hit the Event Horizon, One of the crew is calling out the closing distance and another confirms this information. Regardless of clouds obscuring their view they were aware of their proximity and the fact that they were speeding towards it and forced to attempt an abrupt stop makes no sense.
Plot hole: How could Pod have been sure that Pete would have all the things he needed, when he is preparing to rescue Peagreen from the milk bottle?
Plot hole: Katherine (Kirstie Alley) the tooth fairy is instructed by Rodgers (Lynn Redgrave) that she can only go out at night, otherwise she stays in an apartment in Limbo to get her assignments. She is given names all over the world. There is always a part of the world that is in nighttime. She should always be working and never at Limbo.
Plot hole: Why would the press converge on Greenleaf to begin with. Nobody but the residents of the town know that Howard still thinks that he is straight. Why would press people from across the US think that there was a story there? Dozens of people get thanked every year at the Oscars and the press certainly doesn't do follow up stories on every single one of them.
Plot hole: When they are trying to find a way to stop the lava from going in to the museum, Tommy Lee Jones has an idea to push a bus up against the museum to divert the lava. The plan works but the lava does not melt the bus like it melted Tommy Lee Jones' car or the fire truck. Even though the bus melts later in the movie, it doesn't melt it instantly like it did with the fire truck.
Plot hole: Susan theorises that the insects have evolved to resemble people because of predatory pressure. However, for this to be true people must have been killing them - apart from the handful of 'moles and junkies' (who were the prey, not the killers) this film shows the first contact between humans and the evolved 'Judas bug'.
Plot hole: When Chris Tucker phones his girlfriend from from the mansion, we see the 2 detectives, staked out in front of the girlfriend's house listening in on the call and trace the call to Beverly Hills. At the end of the call Tucker tells her that he's "on his way over". The detectives apparently aren't too concerned about this or forget, as when Tucker shows up, they are still casually sitting in the van. They haven't called for backup to set up an ambush or anything, no, -one of them is asleep and the other decides they should go check out the girlfriend's apartment after seeing a light go on.
Suggested correction: As we who have seen the film all know, ol boy with the grey/white hair is actually a crooked cop and the younger hothead listens to him. Even when Tucker shows up at the house he still doesn't reveal that he is a crooked cop, not until he has the diamonds does he do that. It makes perfect sense for them not to call for backup, and they use her turning the light back on as proof that he has shown up showing that they heard him say he was coming.
Plot hole: The animal keepers take some tame animals to Rollo's office carrying them in their arms. When they leave the animals behind so that Rollo can shoot them they put them into cages. They didn't bring any cages with them nor were any already in the office when they came in. (00:13:35)
Plot hole: What happened to the two boys who stayed in the museum past closing, after the homeless guy seemed to attack (or at least be seen to be stalking) them? The next time we see them, it's the next morning, and they're fine. So where did they go? Who helped them? What happened to the homeless guy? The boys couldn't have just hidden, as the homeless guy has been in the museum for ages, and these two boys just got there that day. The homeless guy would have known all the nooks and crannies and every little hiding spot available; he would have caught them.
Plot hole: When Quinn is in the airplane, trying to get away, they are already above land, with civilization (you can see some buildings). There goes the whole isolated theory.
Plot hole: Jennifer Ehle gets a note from her husband, who is a prisoner in the men's camp a few miles away, saying, 'We're escaping on Sunday night. See you in Sydney.' So, even though this note is going to be passed via several people, any of whom might betray him, not only does he explicitly say he plans to escape, but even when he's going to do it. No wonder he gets caught.
Plot hole: Interesting to note...in the opening scene where Pete is talking to Jack, Pete says that the boiler pressure needs to be dumped every night or it'll blow because the safety valve has been rusted shut for the last twenty years. Then he continues on to say that last year's caretaker, Grady, killed himself, and he was alone at the hotel. So...why didn't the boiler explode last winter? (00:02:20 - 00:05:55)
Plot hole: When Ann and Runaway are fleeing from the dinosaurs in the car, suddenly a fence flaps into the screen and blocks the ways of the running dinosaur. This makes no sense and is never explained, since none of Ann's friends or anybody else is anywhere around there to manage this, nor is the fence ever mentioned, nor is there any other (reasonable) reason that the fence would block the way exactly in this moment.
Plot hole: A Bug meteor knocks out the Roger Young's communications. She dodged it at sublight maneuvering speeds, indicating that it is moving fairly slowly. If it is so important that she warn Earth it's coming (which is how we know their comm was damaged), why doesn't she jump back to tell them or destroy it herself? Even if she has no capital ship weapons (she is a troop carrier), there is no indication that her faster jump drive is damaged or needs longer than they have to warn Earth to charge for a jump, or that she can't leave her patrol station, etc.