jle

Continuity mistake: There is a closeup of the clock at the office showing that it is 9:21 and therefore that Willard is late again. Mr. Martin shouts at him for less than a minute and then in the background you can see the clock reading about 9:35. (00:27:20 - 00:28:10)

jle

Continuity mistake: When the rats are tearing the newspaper, the amount of damage to it is inconsistent. At one point they've torn all the way through the blue banner at the top of the page; later it is whole again. (00:24:50)

jle

Continuity mistake: When Willard feeds the rats in the basement, the container of nuts is next to a Coke bottle. When he leaves the basement, there is no bottle and the lid from the nuts container is in a different place. (00:20:05)

jle

Other mistake: Real supermarkets do not put cornflakes and rat poison in the same aisle. (00:04:35)

jle