Continuity mistake: When Elmer tells Sylvester that he will be thrown out if he makes one more sound, you can see that Elmer's pyjama top has two lines on it, but when he comes down the stairs to say who is leaving the premises, the top has now two buttons on it.
Continuity mistake: When Bugs discovers that Mr Hyde fired a hole in the wood that he used to board the door up to stop Mr Hyde from entering the basement, the number of planks change between shots.
Continuity mistake: When Jerry runs onto the record player, he runs next to a button panel and there are four buttons on it: Fast, Stop, Start and Change. But when he is pressing random buttons later on in the cartoon, a "Record" button has been added and the "Change" button has disappeared.
Continuity mistake: Buster Keaton drops his coat on the sidewalk in front of a light post. When he returns for it in the next shot, the coat has moved and wrapped itself around the pole.
Continuity mistake: In this first Mr. Magoo animated short, Waldo is playing a four-string banjo. Throughout the cartoon, the number of strings keeps changing. Sometimes there are three and sometimes there are only two.
Continuity mistake: When the nightclub manager is chasing Stan in and out of several rooms in an apartment building, it is dark outside the windows. When the two men climb onto the fire escape, it is daylight. In addition, several scenes in the hallway were printed in reverse. The "JANITOR" sign on the closet is in reverse.
Continuity mistake: In a close-up, Ollie is lying on his back in bed and starts to get up. In the immediate long shot, he is on his hands and knees and rising from a prostate position.
Continuity mistake: When Tom picks up a telephone book, you can see he is holding the book with both hands, but when we see a close-up of the "Ajax Mouse Exterminators" in the next shot, his hands are nowhere to be seen.
Continuity mistake: When Sylvester's conscience appears by the tree stump, the position of Sylvester's left leg on the stump changes between shots.
Continuity mistake: When Jerry and one of the puppies hear Tom whistling during the thunderstorm, you can see that there is a newspaper by the puppy when he and Jerry look out from their shelter, but when Tom falls into the river, we cut back to Jerry and the puppy and the newspaper has disappeared.
Continuity mistake: When Calvin Q. Calculus has invented the portable hole, he says "Eureka!" and you can that there is a beaker on the desk, but in the next shot the beaker has 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.
Continuity mistake: When Hassan is trying to remember the magic word to open the cave door, you can see there is a burrow tunnelling under the entrance, but when we return to Hassan trying to remember the word later on, the burrow has disappeared.
Continuity mistake: When we first see the cheese where Hubie and Bertie have been eating from, there are two holes and by the left hole there are pieces of cheese. When Hubie emerges from the hole, the pieces have disappeared.
Continuity mistake: When the millionaire is addressing Spike and Droopy at the beginning of the cartoon, you can see his briefcase is at the right hand corner of the table. In the next shot, the briefcase is now in front of the millionaire.
Continuity mistake: When the bird with the accordion comes to do his audition at the radio station, the right bellow of his accordion has nothing on it. In the next shot, buttons have appeared.
Continuity mistake: When we see the injured dogs at the end of the short, there are five dogs on the stretcher and one dog carrying it at both ends, making it a total of seven dogs. When the dogs run up to the window to see the celebration at the kennels, there are now only six.
Continuity mistake: When Bugs throws Sam's treasure chest out of his home, you can see that the chest is well away from the hole, but when Bugs emerges from his home covered in jewellery, the chest is much closer to the hole than it was in the previous shot.
Continuity mistake: When Elmer says "Step right this way" before escorting Bugs out of his house, you can see the handle is on the right hand side of the door, but when we see Bugs in the next shot on the other side, the handle is on the right hand side as well. This means that the door handle where Elmer is should have been on the left.
Other mistake: When Wrangler is first seen, he is shown autographing tickets by driving over them. There is a tyre mark shown on the tickets when he first does it, but a few minutes later, when he autographs Cruise's tickets, there's no tyre mark on the tickets, even though he used the same method. Also, when Lugnut shows the tickets to the police car at the end, the tyre marks have now appeared. (00:08:05 - 00:11:15)