Revealing mistake: In Carnosaur 2, there is a scene where a raptor grabs a girl out of an elevator and kills her in a room. The room is in a building that is a government base in the middle of the desert. In Carnosaur 3, there is a room in a civilian meat packing warehouse in the city where the military unit is trying to catch the dinos. The nitpick is that the room are very obviously the exact same set used to be 2 different locations but are exactly the same within a series of same movies. You can tell the room is the same by the items in it, I'm not just talking the floor plan, or similar windows. There are barrels, pallets, crates, etc that are the same colors, the rooms are the same colors, the junk piles match-everything is exact. The director must have liked that room set and decided to use it again as a supposed different place. Too bad they didn't at least move some things around a bit.
Revealing mistake: A big deal is made of the fact that the female marine is left-handed, but the shot where she throws the knife to establish this fact is flipped - the writing on the poster that she is using as a target is backwards.
Revealing mistake: At the beginning of the film, after the marine finishes relieving himself off the back of the jeep, he reacts to an explosion before it actually occurs.