Corrected entry: There is a scene where Carla and Turk have just arrived by cab to the hospital. Turk and J.D. see each other and Carla tells Turk "go ahead" and he runs off leaving Carla standing in front of their luggage. A few seconds later J.D. and Turk run past each other in the hospital in front of Carla, who is now magically wearing scrubs and holding a chart.
Corrected entry: As JD gets on his scooter to go see Molly, he makes an action as if the bike has a kick start, but when the bike falls over after he runs into the wall, there is no kick start. That model bike has an electric start, although JD might like to make it look like his has one.