Plot hole: Tyler jumps into the water, then grabs his mask and puts it on and begins swimming, but he fails to clear his mask by blowing the water out of it. Without clearing it, he wouldn't have been able to see a thing.
Plot hole: In the scene where Ann is laying/sleeping with Kong on the cliff, her dress should not only be beyond filthy, but it should be tattered and shredded. It doesn't so much as have a thread out of place after being carried so violently through the jungle and being caught between Kong and the dinosaur. Also, she at this point has been in Kong's possession for several hours to a day or so, and not once has she even shown any signs of hunger, thirst, or the need to relieve herself.
Plot hole: Travis does the last time jump to change the events of a previous time jump. As all the jumps were to the exact same time to kill the same dinosaur, the travelers of the second jump must have found there the travelers of the first one. The travelers of the third jump must have found the travelers of the second and the first, and so on.
Plot hole: In the scene where The Commander and Jetstream are called to fight the giant robot, Will's mom says "What if he forgets his lunch?" In every scene where he's eating lunch at school, Will has a school lunch.
Plot hole: After E.D.I. goes rouge, Kara brings up his weapons list, which consists of 2 ThroatRippers, 2 ShockHammers, and 3 Blue Ferrets, so E.D.I. has 7 missiles. He fires two during the Russian dogfight, another two when he and Ben escape from Alaska, and another two at the Korean border - one of which is the last missile. That's 6. So where did the last missile go?
Plot hole: When Pumpkin is telling Sayuri about Hatsumomo talking to Dr. Crab, she says that she was waiting outside during the conversation, and while she could hear it, she couldn't see them. However, at one point Pumpkin describes a facial expression of Dr. Crab.
Plot hole: The manner in which the Microwave emitter is used to vaporize the city's water would not go as intended. Microwave emissions coming from a device located inside of a train that has a very metallic exterior will unavoidably be affected by the photoelectric effects resulting from any microwave beam that is focused at the water mains below the train from within it. A fork placed within a relatively low powered kitchen microwave would encounter a similar effect.
Plot hole: At the end, Hartigan races out to the Roark Farm to save Nancy, where he takes out two guards quietly, with a switchblade knife. As he dispatches the second guard, we see the ruthless cannibal killer Kevin just yards away, inside the house, reading. Hartigan then makes a blunder, starts rushing, and he is shot by a third guard. Hartigan kills the third and a fourth guard with two handgun shots. Obvious question: With three gunshots in rapid succession just outside the remote house, why didn't the hyper-alert and agile Kevin come out and rip Hartigan to shreds? No, the generic contention that "Kevin wasn't concerned with Roark's son" is not an answer. When Marv infiltrated and attacked the Roark compound (twice), Kevin immediately engaged Marv. In both instances, Kevin responded to attacks on the compound without even knowing who was attacking. But Kevin completely ignores Hartigan's attack, which seems like a plot hole.
Plot hole: When the brakes fail on the truck, Cold insists that he and the woman have to jump from the truck, simply switching off the engine would have been effective seeing as the truck was a long way from crashing into the tanker, and plenty of room either side of it to avoid it.
Plot hole: Eva has OCD. She states she can't touch doorknobs. When her and Deuce go to the aquarium, he has to open the door because she cant. Yet later in the movie, she opens her front door when Deuce comes to her door.
Plot hole: In the yearbook scene Tim barges into Jamie's room and asks her to sign his yearbook, pushes Chris off the bed, and they somehow get their yearbooks mixed up. Tim's yearbook is left in the room with Jamie and Chris, while Tim takes Jamie's yearbook that Chris wrote in with him. When Chris asks Jamie to read the message he wrote in her yearbook, she instead reads the message that Tim wrote to her in his own yearbook. If Tim was asking Jamie to sign his yearbook, why would sign the yearbook with as if he was signing Jamie's. If he was intending to sign Jamie's yearbook, he would have written in the same yearbook that Chris wrote in and not his own.
Plot hole: Lisa calls Cynthia and tells her to pull the hotel's fire alarm, which she does. Cynthia then physically goes up to the Keefe's suite to warn them something is wrong. Even though the fire alarm was pulled and it can be heard blaring in the lobby, the Keefes and the security team seem to have no idea that there is a problem until Cynthia knocks on the door and tells them to get out.
Plot hole: General George Deckert orders his men to kill the President "Get rid of him", but once this execution, that would make perfect sense in the context of his plan, is interrupted by the cannon shot he spends all the rest of the movie until the very end to drag the President with him for no reason. The longer he keeps him hostage, the more difficult for him it is to cover the story up in any way. (01:18:00)
Plot hole: If the creatures are strong enough to simply burst through the walls, as shown at the end of the film, then the creature upstairs should not have been stopped by the small door that Bozo, the bartender and heroine shut on it to stop it. It was one of the larger creatures as well, so it could have easily gotten through.
Plot hole: Even if Chicken Little was tagged out when he hit home plate, the game was already tied so his team would still have a chance to win the pennant.