Continuity mistake: When Clifford is running down the hallway from Moody and his gang, Moody closes in on him by almost 40 feet. In the following shot, outside the auditorium, Clifford is a greater distance from the gang, sighing relief at the apparent getaway. Unless he suddenly picked up speed rounding some hallway corner, the time distance is impossible.
Continuity mistake: Near the beginning of the film, Bill Murray takes a seat front-row-center in court. Moments later, he's doing push-ups in the corridor. A few moments later, he's back in the same seat front-row-center in the courtroom.
Continuity mistake: When Ira and Glenda are discussing Nick, who is hiding under the bed, Ira briefly stands on Nicks right-hand pinky finger. After Ira has walked away, under the bed Nick grimaces while holding his left-hand pinky finger.
Continuity mistake: The woman next to Slade when he's at the BBQ at the party holds her glass up, down, up in different shots. (01:14:40)
Continuity mistake: After the failed robbery with the water gun, the friends try one more caper. Elaine knocks down a stack of paddles; a few are left standing against the ticket booth, but the moment there's a cut, a single paddle is still up. (00:50:25)