Continuity mistake: At the end of the film, when the camera is focused on all of Mary's suitors in her apartment, you clearly hear Matt Dillon say "Dom?!" off camera (as if he entered the room and was surprised to see Woogie there). A few seconds later, he bursts through the door, sees Woogie and says "Dom?!". (01:45:10)
Continuity mistake: As Ben drives up to Mary's house to take her to the prom, you see the front of the house and the front door with the door knob on the left side of the door. When the door opens though the handle would have had to be on the right. No way the door could open the way shown in the movie if the handle was on the left.