Continuity mistake: The time sequence in the beginning is very screwy. The victim and her friend are partying inside and it is dark outside. The streetlights go out and the inside lights in the building go off. As the girls come out of the building, it is daytime. Seconds go by, then it is midday. As the girls talk to Mr. Biker/Murderer in the close-ups, the sun is in front of them and their butts are in the shade. In the zoom-out shots, their butts are in the direct sunshine.