Continuity mistake: At the beginning of the cartoon, we see Yosemite Sam reading a newspaper on the window at the Center News. The name of the newspaper Sam is reading is "News Highlights", but when we see a close-up of the paper in the next shot, it is now called "Evening Post."
Continuity mistake: When Fred (Ralph Wolf in disguise) says "Hello" to Sam at the end of the short, you can see that there is a card in both the top and bottom holes in the "In" section of the punch clock. But when Sam begins spanking Ralph, the bottom card of the "In" section has moved to the bottom hole of the "Out" section.
Continuity mistake: Before Elmer runs off to fetch his gun, you can see there is a carrot near his feet on the ground. But when he returns, the carrot has gone.
Character mistake: The hand bill identifies the company as Slipp-Skipp and Tripp. The sign on the door says Slipp, Tripp and Skipp.
Continuity mistake: When Bugs Bunny closes the door on Daffy Duck at the end of the cartoon, Bugs is holding his pencil upside down, but in the next shot he is now holding it the right way up.
Continuity mistake: Lieutenant Bowers questions the survivor of the first encounter with the alien, suspecting he might have just clobbered a love rival. The telephone rings; after it happens, the sheet in front of the suspect does a 180°. (00:09:35)
Continuity mistake: When we see the park where the wild cat is hiding, there is a sign saying "No Le Pate de Fois Grass", but when we see the sign in the next shot, the "Le" has disappeared.
Revealing mistake: In the beginning where Vincent Price is brawling with his business partner, his partner throws a pipe or bar at him. Price ducks and the bar hits something that the camera was connected to, because the scene jerks.
Character mistake: On the sign outside Dr I.Q. Hi's headquarters, the word "Stratosphere" is spelled "Stratopere."