Why did the bat go to the Halloween party?

Because it was a hanging good time!

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

Because it wanted to send a scaled-up package

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

He heard the drinks were on the house

Why did the mummy get grounded after trick-or-treating?

He kept unwrapping all the candy before he got home!