Continuity mistake: When Andy and his friends are on the loading dock smashing the bulbs, there is a white mark from a smashed bulb on the dock next to Cal. But in the next shot the mark has vanished, and Cal smashes another bulb in the exact same place, producing the white mark again. (00:30:45)
Continuity mistake: On the 20th date, Trish and Andy are sitting on a chair discussing the date and that they are going to have sex. When Andy speaks, her right hand is on his top button. When Trish speaks, its back in her lap. This happens three or four times, all in the same conversation.
Visible crew/equipment: In the final sex scene, a crew member's foot is momentarily seen on the upper right side of the screen.
Continuity mistake: During the scene where Beth is in the bathtub, all of Andy's shots have Beth's foot in the lower right hand corner, even though she only has her leg up for portions of the scene. Eg: when Beth puts her "friend" in the water, both her legs are under; we cut to Andy and the foot is in the shot, and then we cut to Beth and both her legs are still under.