Why did the trick-or-treater keep knocking on the same door?

He wanted a re-treat!

What instrument does a skeleton play?

A trom-bone.

Why did the trick-or-treater wear sunglasses?

Because they didn't want to be *seen* eating all their candy at once!

Why did the werewolf go to the library?

Because it was looking for a paws-itive reading experience.