Why did the Creature from the Black Lagoon go to the post office?

Because it wanted to send a shell-abrate greeting card to its friend.

Why did the zombie go to the prom?

Because he heard it was to die for

Why did the trick-or-treater bring a ladder to the party?

He heard the drinks were on the house

Why did the mummy take a break from work?

He was feeling all wrapped up!