 CONT: When Karl is talking to the Frostee Cream Boy, there are no  cars on the road behind him. But whenever the camera is aimed at the  Frostee Cream, there is a lot of traffic on the road reflected in  the window. Thornton points out in the DVD commentary that this is  because the local police had another pressing issue the day they  filmed Jim Jarmusch, and they couldnt be there to stop traffic.