Continuity mistake: When Chico and Harpo bring Groucho ice in his office at Huxley College, Harpo is wearing some kind of earmuffs. Between shots they change from going round his chin to behind his head.
Visible crew/equipment: When Stan and Oliver walk up the steps to their flat after "borrowing" money from the bank, the shadow of a boom mike is following them up the steps.
Continuity mistake: When we see Oliver reading his newspaper at the beginning of the short, the door behind him is open. In the next shot, the door is closed, and in the following shot, the door is open again.
Continuity mistake: When Oliver introduces Stan to Harry at the snack bar, you can see that Harry's right arm is by his side but in the next shot it is resting on the counter.
Continuity mistake: When Harold climbs in the window of his house, his car rolls away to the right. After hearing the crash, he runs back to the window and looks out - to the right, where he sees the wreck. But that's the wrong direction. From inside the house, the wreck should be to the left. (00:08:00)
Continuity mistake: When Arthur Houseman takes out the water from the jug and replaces it with gin, you can see there are two glasses in front of the jug, but when we see him pouring gin into the jug in the next shot, the glasses have changed position.
Continuity mistake: When Stan pokes Oliver in the eye, Oliver steps backwards and you can see the floor around him is saturated with water. But when we see Oliver putting his shoe into the nails on the piece of wood, the floor is now completely dry.
Continuity mistake: Oliver returns home to find Stan holding a hose and putting out of the smoldering remains of a fire that destroyed much of the house. In the medium-range shot that follows, Stan's right arm is at his side and the hose is on the floor.