Continuity mistake: In the scene just after Joe finds his parents, when they are sitting in their trailer talking, his parents have a stuffed clown between them. Just before Joe asks them if there ever was a time when they'd be staring at the moon, the clown is slumped forward with its face not visible. In the next shot, when his mom starts her sales pitch about having clowns for sale, the clown is now standing upright between them.
Audio problem: In the scene where the janitor is tap dancing in the hallway, the tapping sounds do not match up with the times that his feet hit the ground.
Revealing mistake: After Joe blows up the A-Bomb, the film is reversed for a second as is evident by Joe's "I Choked Linda Lovelace" shirt.
Continuity mistake: The 8-track has name on front in the beginning, Then when Joe turns it down to show I.D, Its a completely different 8-track. But the same song is playing. (00:00:45)
Continuity mistake: When Joe spins the tires for the security guy, The tire that's supposed to be spinning is on the left side. But after Joe says "does this look like a piece of crap to you?" It shows the right side spinning on close up 3 times, But when they show a wide shot of the car the right side is not spinning at all and the rubber burns are on the left side of the car. (00:01:45)
Continuity mistake: At the end of the movie in the scene with Joe and his parents, after Joe leaves the trailer, his dad has a beer in his left hand, then not, then again, then not.
Continuity mistake: When Joe starts to hold up the picture of his parents butts, on the right side of the podium you see grass on the microphone. When Joe asks if any one has any info, the grass is gone. It happens a couple of times during the interview. (00:57:40)
Continuity mistake: In the scene where Joe sees the "dead" janitor, he goes under the police tape twice (once when he is talking to the police officer about the death, then again when he goes to say goodbye to the janitor.)
Revealing mistake: When Joe is strapped to the atom bomb he orders a girl to show him her boobies. When she takes her top off, you see a back shot of her (so you can't see her boobs) but her body is transparent and you can see Joe's arm through her body. Obviously, the girl was superimposed onto the shot. (00:34:40)
Continuity mistake: When Clem stops dancing and starts talking to the fire extinguisher, he throws the duster broom handle down, which is in the same direction as the duster. Then when he asks question, "Does your mother sew?" the handle of duster is now sticking out the wrong way. (00:56:10)
Continuity mistake: When Joe peels out and the security arm goes down it is split near the lower part by the gear box. Then when security guy kisses the arm, the split is gone. Use slow mo and you can see it. (00:01:45)
Continuity mistake: In the scene where Joe sticks his head into the aligator's mouth, while he is explaining the 3 rules, his cigarette changes hands from one shot to the next.
Continuity mistake: At the end of the movie when Joe, Brandi, Kickin' Wing, Gert B. Frobe, and the alligator girl are in his car, Robbie pulls up along side of them. Joe pulls out, spinning dirt and rocks toward Robbie's car, and a camera shot from inside his car shows Joe's car speeding away, and the windshield is completely clear. But in the very next shot, from in front of Robbie's car, the windshield is broken, and has 2 places where it appears as if large rocks had hit, but they weren't there seconds before, and the dust and flying rocks had already begun to clear by that time. It is illogical for a rock large enough to do that kind of damage to his windshield to have suddenly kicked up, judging from the distance it shows Joe's car away from Robbie's in the previous shot.
Continuity mistake: Near the end of the movie Joe wakes up at Brandi's house and they run out to find Joe's "hemi" sitting in front of the house. The camera shot shows the car from the right side, and you can see the rear-view mirror attached to the windshield. And shortly afterward when they all get in Joe's car, another camera angle shows the mirror as well. But when they're speeding away from the house the camera angle from the front of the car shows the mirror is no longer there.