Continuity mistake: When Jerry is removing the nail from Spike's foot with a hammer, the distance of the wall behind Spike changes between shots.
Continuity mistake: Before Tom is about to draw a line on the alarm clock on the blueprint, you can see on the left hand side of the clock there is an "A" and an arrow, and on the right hand side is some writing. When Tom draws the line, the "A", arrow and writing have all disappeared.
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 Tom realises he is drinking sea water in the bucket Jerry gave him, he drops the bucket on the towel, but when he spits the water in the girl cat's face, the bucket is nowhere to be seen.
Continuity mistake: When the announcer says the Droopy and Spike have to follow the white line during the mile run, you can see that Spike's vest has a red line on the bottom. When he rubs off the white line on the track in the next shot, the red line has gone.
Continuity mistake: When Yosemite Sam fires Bugs from the cannon, Bugs has "3 1/2" on his prison outfit, but when Sam orders Bugs into the prison cell after recapturing him, the "3 1/2" has disappeared.
Continuity mistake: When Pluto is dazed after crashing into his kennel after falling from the tree, the position of Pluto's right paw on the grass changes between shots.
Continuity mistake: When Tom is searching for Quacker, you can see that he is holding a fork in his right hand, but when he finds Quacker in a sandwich, the fork has disappeared.
Continuity mistake: When Porky puts Sylvester in the basket in the kitchen, an arrow lands on the wall. But after Porky leaves, we cut to Sylvester and the arrow has disappeared.
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.
Continuity mistake: After trying in vain to sleep in the upper berth of a railroad car, Laurel and Hardy hastily get dressed and get off the train at the Pottsville station. As they watch the train pull away, they are wearing each other's derby. In the immediate close-up, each of the two is wearing his own derby.
Continuity mistake: When Tweety hits Sylvester on the paw with a mallet, the background behind Sylvester changes between shots.
Continuity mistake: When Sylvester sees the Daily Bugle newspaper, the front cover headline reads "Police Hunt The Cat." You can see the words THE CAT have nothing around them, but when we see a close-up of the newspaper in the next shot, inverted commas have suddenly appeared.
Continuity mistake: When Goofy searches through the dresser drawers one of the ghosts causes trouble, then Goofy breaks through the top of the dresser and winds up trapped inside, but when all four ghosts appear the dresser top is perfectly fine and that damage has vanished. Also, two of the drawers (one large and one small) fall out of the dresser, but as the four ghosts are pushing the dresser those two drawers have reappeared in their proper places.
Continuity mistake: When Spike grabs the bomb (painted as an apple) from the cockerel, he takes a bite out of it. You can see that when Spike is about to eat it, the eaten part of the bomb is facing his mouth, but in the next shot the eaten part is now facing downwards.
Continuity mistake: When we see Elmer getting himself ready to go to bed at the start of the cartoon, the window he is dressing in front of does not have a frame, yet it does have one when see Elmer winding up the alarm clock in the next shot.
Continuity mistake: When Mr Theeves is speaking to Droopy while he is packing, there are three suitcases on the floor. In the next shot, the cases have disappeared.
Continuity mistake: Upon seeing Donald Duck's footprints in the sand, Chip walks the length of one footprint, leaving eight of his own footprints as he goes. He fetches Dale to show him Donald's footprints but when Chip reaches the footprint he walked across, his own footprints have vanished.
Continuity mistake: When Elmer Fudd is on the telephone to the operator, you can see that he is at the far end of the lounge and there is a pattern on the wall, but when Bugs Bunny sneaks in behind the radio, Elmer is now positioned near the corner of the room and there's no pattern. 2 lamps also appear by the archway.
Continuity mistake: In this movie, the Tramp leaves a letter for a girl, which shows up twice; It is obvious that the second time it shows up, it is a different letter. (00:24:50 - 00:26:00)