Continuity mistake: Billy and Wendy pull over to the side of the road and Wendy turns the car off. As they sit in the car on the side of the road, exhaust can be seen coming out of the tailpipe. (00:15:55 - 00:18:45)
Continuity mistake: Billy sits in the bathtub wearing nothing but his underpants. Later, when he is in the bath with his girlfriend, he's wearing a white undershirt he never had. (00:45:00)
Continuity mistake: When Billy and Wendy are at his parents', various items disappear from the table when the view changes. Most notably Billy's water glass.
