Continuity mistake: When the convict sees Droopy on the banister, he slides back up and goes into his apartment. When he arrives at the apartment, there is initially nothing on the door but a few seconds later a door handle and lock appear.
Continuity mistake: When the convict runs out of the apartment, he runs into a yellow taxi and you can see the taxi has two windows on the back of it. But when the taxi arrives at the airport, there is now only one window on the back, and in the shot after that, there are now two again.
Continuity mistake: When the convict runs up the stairs to his flat, you can see that the front door has a handle on the left hand side and three panels on it, but when the convict is in his flat in the next shot, the panels and the handle have disappeared.
Continuity mistake: When Droopy is standing the door, he tells the convict he's going to call the cops. At this point you can see there is nothing next to Droopy on the frame, but in the very next shot a hinge has appeared.
