Revealing mistake: When Jason (in Robert's body) is shot in the head at the end of the hall, a close up reveals the bullet hole to be obviously just makeup. (01:05:35)
Revealing mistake: While in the convenience store, watch the arcade screen the punks are playing, they are getting very excited about the game, however anyone who has played Street Fighter 2 will notice that they are merely looking at the demo version and even the words "insert coins" are displayed on the screen.
Revealing mistake: When Robo gets his arm chopped off by Otomo, he stands up and in Robovision, you see that he needs power, but you cannot see Otomo who is supposedly right in front of him.
Revealing mistake: After Connie does the dive, for someone who has just been underwater she is hardly wet at all when she gets out and when she 'dries herself off' with the towel.
Revealing mistake: In the prison escape scene, Mario and Luigi get on a zip line like pulley track and swing though the prison. Goombas are shooting fire balls at them. The first fire ball slowly goes and hits a wall. Watching closely, you can see the line of fire travel down the wall, showing where the special effects crew had pre-coated the wall with a flammable fluid.
Revealing mistake: Towards the end of the movie, when Spartan goes after Phoenix in the cryolab, he fires several rounds at him with his Beretta 92 handgun and the slide locks back indicating he is out of rounds. The camera pans to a shot of a crane as he inserts a new magazine and is about to pull on the slide. However, when the camera returns to him, he pulls the slide back and a round can be seen ejecting out, indicating he hit the slide release before pulling the slide back.
Revealing mistake: In the scene where Rick returns from the lab with the macaroons, it is obvious that the worm man is only in half of his costume. He's wearing black pants and shoes and sitting on a stool.