the moving scar
My friend and I noticed that once in the movie. (in the bathroom after the vice principal is "copied" to death) that Brian's scar had moved from his left cheek to his right. Then in the next scene its back to the left. Whoops.
PS: Donovan Leitch is so freaking hot that I would have f*&^%!d him on the woodshop table, even if he had an axe in his hand. :)