Wabbit Twouble (1941)

Continuity mistake: When Bugs puts up a "Camp Here" sign near his hole, you can see there is nothing behind the sign, but in the next shot a tree has suddenly appeared.

Continuity mistake: When Elmer puts up his tent at the park, you can see there is a deckchair next to the tent, but when Bugs pulls the tent into his hole in the next shot, the deckchair has disappeared.

Continuity mistake: When Bugs is painting Elmer's glasses with black paint, you can see there is only an alarm clock on the table next to him, but when Elmer thinks it's night time, look at the table and a torch has suddenly appeared.

Trivia: The names in the opening credits are written in "Elmer Fudd-ese"'; that is, written the way Elmer would say them.