Ricco, then Barbi, leave Ned to watch Ray. At this point, Ray only has his hands bound. Ray talks with Ned, and the film goes to the interactions between Izzy and Barbi. But when the film returns to Ned and Ray, Ray is suddenly tied to the chair (the rope is around his chest and chair multiple times).
The radio shown in the ice cream truck is actually a Digital II music box for said vehicle.
When Ray is held hostage in a classroom, a whiteboard reads "Today in History: USS Thresher sinks in Atlantic Ocean" even though that happened in April. The film takes place in December.
When Izzy cuts the power to the school, all the lights go out except the Christmas decoration lights,
The film takes place in Duluth, MN. But on the weather map, Lake Superior is nowhere to be seen.