Continuity mistake: When Jason Lee is driving the car over the humps in the road, Julia Stiles is in the passenger seat. In the shot before they take off Jason Lee is in the driving seat, when they show the shot of the car in mid air Julia Stiles is now in the driving seat, and in the shot as the car lands they are back in the right seats.
Other mistake: In the main titles, for casting, the name "Brennan Dufrense", is listed. It should read 'Brennan Dufresne'.
Ken: So, Buck, are you a duffer?
Buck: Well, if you mean do I like playing with my balls, the answer's yes.