The news reporter spits up green dye from his mouth, but when he collapses and has a meltdown on the ground - he's now spitting up foam.
The mutant squirrel is shown wandering on hay, yet when he squashes the news team - the creature is now on grass.
The mutant squirrel clearly takes down the power plant towers, yet in subsequent shots - the towers are intact.
The Tromaville Institute of Technology destruction and its chain of events are out of sequence and altered - in contrast with Part 2: Subhumanoid Meltdown.
The amount of green slime on the Subhumanoid baby at the end.
When the helicopter holding an acorn flies past a bunch of trees, the trees appear to be much larger than the aircraft itself - revealing it to be an obvious use of a toy RC helicopter.
(around 54 min.) When two other security guards get shot, no blood appears on the wall behind them.
The cigar that Holt smokes isn't smoking in some scenes.
Obvious usage of miniatures at the beginning.
The Adlai infant is clearly a doll.
The news reporter spits up foam yet he's still able to shout "I'm melting! I'm melting!".
Trish moans, while making out with Adlai.
When Professor Holt is lifted off the ground by the mutant squirrel and then dropped, the camera and camera crane's shadow is visible.
When Dick beats up a hobo and throws him to the ground, the cameraman's silhouette can be seen below.