Other mistake: In the scene in the beginning when Chazz Michael Michaels is being introduced, there is a brief shot where Chazz is alone skating in the same storage where, much later in the movie, Jimmy and Chazz practice for the World Wintersport Championship.
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.
Answer: Jon Heder was not uncredited. His name is on the posters, etc.
Myridon