VIDEOS:
Wallace's Ball
When Wallace and Gromit landed on the moon for a picnic, the first thing he's does is to kick a ball. However, the ball didn't come back down due to being in motion in space. It shows up again after the credits, still in motion.
Example of:
Brick Joke
No crackers, Gromit!
Example of:
Oh, Crap!
Moon Cheese
Example of:
Cheesy Moon