Continuity mistake: When Rex slams on his brakes after Ian tells him that he met a girl online, the background outside the driver side window is a building with trees around it. The shot then switches to the passenger side. When the shot goes back to the driver's side, the background outside of the window is just trees and other shrubbery, even though the car is still at a standstill. (00:06:25)
Continuity mistake: When Rex slams the brakes on after hearing that Ian found a girl on the internet, the scenery on Rex's side slows right down to practically stationary. (Like it should since he slammed the brakes on). However out of Ian's window, the scenery is still moving at the same speed prior to Rex braking. (00:09:20)
Continuity mistake: When at Lances house party, Lance is greeting his guests when he passes a girl in a green dress twice. (00:18:10)
Continuity mistake: Ian throws his list of things to take in the bin with it sticking out the bin when the camera cuts away. In the next angle there is nothing in the bin. (00:29:45)
Continuity mistake: When Ian chucks his list of things to take in the bin, the bin's position relative to the table leg changes instantly. (00:29:50)
Audio problem: In the cornfield, after Rick has run Lance over in his truck, Rick gets out and walks towards Lance saying, "Get on your feet, you....!" Although the shot is shown upside-down it is quite plain that his lips are not moving. (00:33:50)
Continuity mistake: When the three are in the car after riding in the corn field, Ian's friends keep changing places - three times. (00:34:45)
Continuity mistake: When Ian is driving the GTO to Knoxville, He pulls out into the middle lane on the bridge, camera cuts and he moves out again. (00:35:15)
Visible crew/equipment: When the GTO is driving to Knoxville, there are a few shots of the GTO passing other cars. When we see the black convertible with 2 girls in it, look in the black paintwork and you can see the camera boom clear as day. (00:35:45)
Continuity mistake: When the GTO has the nachos chucked on the windscreen, the wipers are going in some shots but not others. (00:36:30)
Continuity mistake: When Lance and Seth Green are riding in the buggy, they are talking for a few minutes. During this time the side shot will show Lance with his arm all the way around Seth's back/shoulder. However, when the camera changed to a full shot, Lance's arms were at his side, nowhere near Seth's back or shoulder. This happened several times during this scene. (00:40:35)
Deliberate mistake: When Seth Green and Lance pull up to Ian and Felicia, the car being pulled by the carriage should roll a little bit after the carriage stops moving, but instead it stops on a dime when it is only being pulled by rope, and nothing else to stop it with when the carriage stops. (00:42:00)
Other mistake: When the girl throws her shoes over the tree, she throws them to the side, but the appear on the tree from the opposite angle. Showing that it's not from her throw. (00:52:00)
Continuity mistake: When Lance is sitting on the hood of the broken down GTO, he puts his glasses in a case and sets them on the hood. As Ezekiel pulls up, the view of Lance is from the side and you can see the glasses outside of the case on the hood. (00:52:00)
Other mistake: When Lance and the Amish guy pull up to Ian, the GTO stops dead and judders as if the brakes had been applied quickly. (00:56:10)
Revealing mistake: The shot of the two girls ripping open their shirts at the Fall Out Boy concert is the same clip repeated the three times we see them. (00:58:00)
Continuity mistake: When Rex gets off his bike on the way to see if his GTO is in the garage, the bike continues perfectly straight and balanced. Camera cuts and the bike is on its side. (01:07:50)
Continuity mistake: When Rex is smashing up the garage door, the damage to the door keeps changing. (01:08:05)
Continuity mistake: When Rex is smashing up the garage door, his helmet keep changing position instantly. (01:08:20)
Continuity mistake: When Lance and Ian are in jail, Lance is sitting next to a large man who is slouched forward. While Lance is mid-sentence, the shot changes and the man is sitting up much straighter. (01:11:45)
Answer: LoJack.