Continuity mistake: During family counseling, Gord throws the bust through the window which breaks the glass and the wooden support frame of the panes, and there's nothing sticking out. When he climbs up to jump out, one of the wooden pieces is now sticking out. It's gone again in the next shot.
Continuity mistake: When Gord is showing his drawings and ideas for his cartoon outside of the restaurant to the producer. The producer gets in his convertible then tosses all of Gord's drawings back at him making them all fall on the ground. But when he pulls away the drawings are all held in Gord's hands without showing him pick them up. (00:15:35)
Deliberate mistake: In the scene where Gordon is in the shower wearing his dad's scuba gear and his dad throws the soap on a rope into the toilet, Gordon dives into the toilet to retrieve it. During the camera shots from beside the toilet, you can see that the back of the toilet has been removed so as not to block the view of Gordon with his head in the bowl, but in the other shots, you can see the back of the toilet just fine. (00:34:00)
Continuity mistake: When Gord receives his car in the beginning of the movie the sky looks really dark, and the ground is wet as if it were raining, and in a couple of shots of Freddy it looks as if it is raining in the background, yet in the previous and following scenes it is bright and sunny.
Continuity mistake: In the scene in the offices of RadioHead animations, Gord is holding a large envelope package. He is also given a note which gives the name of a restaurant that Dave Davidson is eating at. Watch the note and the envelope switch hands MANY times in the scenes.
Continuity mistake: Gord builds his halfpipe and it shows it completed, then later in the movie, it shows the outside of the house with the speed increased and it shows a partially complete halfpipe.
Continuity mistake: When Gord's father is outside hooking his truck's winch up to his skateboarding ramp he pulls out of the driveway but at the angle he starts driving it would be impossible for it to be hooked up properly.