Continuity mistake: When Chazz Michael Michaels goes to Katie Van Waldenberg to "comfort" each other Chazz leaves the door slightly open. Then it has a shot of Katie then back to Chazz and the door is completely closed. Then right before Jimmy walks in it shows a shot of Chazz and the door and it is slightly open again.
Factual error: Early in the movie we see the newspaper dated "Sunday, March 14, 1987". March 14, 1987 was a Saturday, not a Sunday.
Continuity mistake: When Stranz Van Waldenberg is chasing Chazz, the latter slides under a pipe, followed by Stranz, who leans backwards. We are shown a close-up of Stranz standing up and continuing skating, at which point the camera cuts to a close-up of Chazz and Stranz can be seen standing up for a second time in the background.
Continuity mistake: Will Arnet's character pulls off his gold tooth during the first routine, and seems to toss it to the side. But while he's talking after the performance is over, it's back on.
Continuity mistake: In the final skating scene where Will and Jon are talking about how Will hurt his ankle and about how they are going to switch spots for the head-slicing move, Will's belt has come undone, and you can see the velcro used to hold it on. Then in the next shot, it is back on with no time to fix it.
Revealing mistake: When Will and Jon are doing their final skate and Will breaks his ankle and they have to switch position in the final routine, they are skating around getting ready to do it and Will lifts up his broken ankle so Jon can grab it. When he grabs the broken ankle, Will shows no sign of pain, but earlier when he tried to skate on it, he screamed in pain.
Factual error: The accident that killed the VanWaldenberg's parents was said to have taken place in 1987. In the TV news footage from the accident scene, the police cars had a distinctive body style not introduced until 1991.
Deliberate mistake: During the bathroom scene where Jimmy is trying to get the key to unlock himself from the handcuffs after the little Asian boy had knocked over the garbage can, the toilet paper roll should have had the cardboard tube attached to it upon reaching Jimmy and should not have various pieces of garbage on it.
Continuity mistake: In the scene where Jimmy and Katie are on their date, when Katie sits down on the bench, you will notice that there is nothing on the bench to the left. It then cuts to Jimmy and back to Katie. You will now see a cone wedged in the seat of the bench to the left, even though Jimmy and Katie are both still holding their snow cones.