Continuity mistake: As the guys sit down for a beer and start talking, the viewing angle is from behind the one listening. As they switch to the other one who's about to say something the two bottles of beer magically turn around so you can always read the front label, no matter from which side the scene is shot.
Visible crew/equipment: The scene where the red car explodes you can see the wires used to set off the explosives.
Revealing mistake: On the toxic plant, where James runs from the forklift coming out of the garage door, the oil drum containing Carl flips off the forklift. When the oil drum flips, you can easily see the mechanism used for flipping it. (01:17:45)
Factual error: The lights and siren of a police car don't go on when starting the engine. They are turned on and off separately from the engine.
Continuity mistake: In the exterior shot of the appartment where James and Louis are at stake out, the inside of the apartment is dark. When switching to the interior shot, the room is well lit.
Continuity mistake: When the lid of the oil drum with the dead body in it is lifted, the exterior view shows a hole in the lid, yet the interior shot shows no hole at all.
Revealing mistake: When Louis picks up the dead body next to the garbage truck, you can see the dead body working to get a grip on the floor, making it easier to pick him up.
Revealing mistake: The shadows in the locker room aren't natural. With a few light on the ceiling and one window, you don't get as much shadows as in that scene.
Audio problem: In the beginning, Estevez carelessly chucks an emptied trash can off camera and it never makes a sound to signify that it landed.
Other mistake: When the bad guy is sliding down the tube and there is a close up of his face, it's constantly lit. There couldn't have been any light in the tube, since it's completely closed.
Continuity mistake: When Charlie Sheen and Emilio Estevez are on their way to the toxic waste dump, each of them are hanging off of separate doors on the toxic waste truck. When one of them gets stuck the other helps him and both swing onto the flatbed. When they are hanging, the yellow barrels are lined until the end of the truck, but when they swing in and land in the truck there is 3 feet of clearance.