Continuity mistake: When Marty and his girlfriend are laying in bed together after engaging in physical relations, Marty lights a joint. It starts off small, but when his girlfriend smokes it then passes it back to him, the joint is longer.
Continuity mistake: The ash in Lisa's hair disappears.
Continuity mistake: Bobby's hair changes a few times/ways when he is showing Derek the video he made. Lengthwise, his hair on the back of his head doesn't always reach the collar of his shirt. Front shots show Bobby's hair is curled upward and dishevelled. Rear views show neatly (or neater) combed hair that is curled under. The back view also doesn't look like Nick Stahl's thin head or hair; the head is more rounded and the hair is thicker (and neater), suggesting back views are of a stand-in. (00:20:21 - 00:20:42)
