Revealing mistake: When the man pushes Leroy's body down the basement stairs, as his body is sliding down, when it's almost to the bottom, you can plainly see Leroy lift his head up as he's sliding, although he's dead.
Revealing mistake: In the part in the motel where THING is doing morse code on the table to Gomez you can see the cut-out in the table where the guy's hand is sticking through the table.
Revealing mistake: Near the start of the film, when Lt. Harley is watching his love interest show off by doing gymnastics on the tree limbs, several times you can see the actual pole she is swinging on, not the tree limb. (00:08:50)
Revealing mistake: In the junkyard, Leo and Raph grab a long pole and plough through several Foot Ninjas with it. It is painfully obvious the ninjas react to the pole before it ever hits them. Especially the guy on the ground. (00:53:20)
Revealing mistake: Towards the end when Vanilla Ice jumps the motorcycle over Nick's car, you can see the ramp he used through the car's windshield.
Revealing mistake: Gratuitous car explosions are nothing new in action films ... but this time the ambulance explodes in mid-air before even hitting anything. (00:32:22)
Revealing mistake: When Ernest's jack flies out from under his truck it breaks the back windshield of the mayor's car. Watch closely and you can see the glass shatter before the jack makes contact with it.
Revealing mistake: When Elizabeths car is stolen, Elizabeth puts the phone down and runs across the street. The camera then pans into the phonebox, and reflected in the grey shiny surface of the phone is someone in a white shirt. (00:06:00)
Revealing mistake: When Akane is sneaking out to the kitchen in order to cook something she briefly has a see-through hand, the animators haven't added any pigment and you can see the background cell perfectly.
Revealing mistake: When Dolph is shot, Brandon says, "It went straight through," meaning that the bullet went straight through Dolph's body. However when it cuts back to Dolph later you can see the bullet has entered the heart region. In other words the heart would most likely be damaged and Dolph would have been dead. (01:09:20)
Revealing mistake: When Rollie is hanging from the ladder and the bolt breaks, you can see the smoke from the exploding bolt. (00:42:50)
Revealing mistake: When Charlie shoots the critter which flies into the air and explodes, we can see the wire the critter is attached to. (01:07:45)
Revealing mistake: Junior can't get on the Crazy Dance because he is a milimeter too short. After seeing Murph (the 20-year old in his class) and Trixie (on heels) get on it, Junior speeds up the ride and all the kids on it get dizzy and barf everywhere. If you look where the puke shoots out, it's a bit obvious it's not coming from their mouths, but from a point behind them. Most obvious are Trixie and the boy wearing glasses.
Revealing mistake: Close to the end of the film when Joe is in the woods with all the bad guys, he starts to shoot them, as he shoots the first bad guy, if you pause it before he shoots, you can see that there is a rather large lump in the guys forehead where he gets shot, obviously some kind of squib or something to make the effect of being shot in the head. (01:13:30)
Revealing mistake: When the plane is delayed because the luggage got crushed, the sign changes their flight status to DELAYED. It's obvious that the one that changed is the only row meant to move. The letters are spaced out so that they can flip over but all the other letters have no spaces and actually look like stickers.
Revealing mistake: About half an hour into the movie, when Frank is in the tank, he plows into a supposedly concrete zoo wall, which wobbles. Also, the wall splinters where it meets the sidewalk, revealing that the "wall" is actually a wood prop, and a flimsy one at that. Five seconds later, when people and animals are shown running out, the same wall is shown with a different shaped hole and pieces of concrete lying around it. Apparently the concrete pieces aren't too real either, as the camel kicks one around as easy as if it were made of foam. (00:30:25)
Revealing mistake: The scene which introduces Sue Ellen working on her new job at Clown Dog firstly depicts people walking in and out of the shop, while the staff serve at the counter. As one family walks out, a boy turns his head to glance directly into the eye of the camera just as he's about to exit the screen frame. (00:17:50)
Revealing mistake: In the scene where John Goodman is facing off with the cops, the walls of the hotel catch fire as Goodman runs down the hallway towards the cops. You can easily see the pyrotechnic cord strung along the wall.
Revealing mistake: When the rock band drop Luccia off at home, they knock over a statue. It's supposed to be stone or marble, but you can see by how much it moves and how it falls over, that it's actually plywood or some other lightweight material.
Revealing mistake: When the postman goes upstairs to see Julie with the package, he steps on the broken step and falls down the stairs. As he rolls down, the bulky outline of kneepads under his trousers is visible. (00:17:30)