Other mistake: The car that almost runs Marty over has the vehicle registration plate of 6S 48405. Later on, when Marty is hit by Sam, Sam's car has the same plate. (00:35:49 - 00:42:02)
Other mistake: When Trash first comes back to life as a zombie there is a shot of rain falling and smoke swirling. The shot plays forward, then reverses for a second or two before playing forward again. The rain falls up and the smoke reverses direction.
Other mistake: When the fake TV ads for the Stuff are shown, the container states "1 Pint (.474ml)". 0.474ml is about an eyedropper drip of liquid. The decimal point shouldn't have been there.
Other mistake: In the mall scene, when Gary and Wyatt sit down on the bench and Max and Ian dump the Icee on them, notice how much slush is actually dumped on them from a 32 oz. cup. (00:32:55)
Other mistake: During the eye exam, Daryl recites the eye chart but does not get it correct.
Other mistake: When Mitch calls his mom asking to come home Kent and his friends hear him make the call. Mitch then has some conversation with his mother. Kent and his friends begin recording the conversation at the point where Mitch says "I want to come live with you". The problem is that when the recording gets played back in the cafeteria the conversation is replayed from the beginning which was before Kent had begun recording it. (00:45:50)
Suggested correction: Kent starts recording when Mitch asks "Mom, are you there?" which is where the recording in the cafeteria starts.
Other mistake: When the 4 humans rush out of the pool house, there are 3 aliens not dressed in their human skins watching them leave. The problem is: only one alien has eyes. We've seen the aliens out of their skins heaps of times and they always have eyes.
Other mistake: Jack glances at the front of the baseball card the Consul gives him, and he says "Hap Ashby, 1963 Angels." He has no idea who that guy from 200 years before is, but the card does not say the year, and he's not a psychic. (00:15:55)
Other mistake: As the spear mounted on the bucket of the loader passes through the wall, it passes over the body on the bunk. Unless it was a dead body or a dummy, the man should have reacted.
Other mistake: When Dagg hits the soldier on the left while the fembot is distracting them, he falls over and the one on the left turns to see what happened. It then cuts to a different view and suddenly the second soldier just falls over without even getting hit.