When Starsky and Hutch meet Huggy Bear for the first time, they are inside the Torino and Huggy is outside. Huggy's arm is on the door the entire time from one angle, but Hutch's arm is in the same spot when seen from the outside view.
When Lenny Biggs (Joseph Reale) is breaking the window glass to get into the sorority house, you can see the glass is already broken.