Why did the Frankenstein's monster get a job at the IT department?

Because he was great at reanimating the network.

What do you call a zombie who tells jokes?

A dead-pan comedian.

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

Because it wanted to send a scaled-up package

Why did Medusa have trouble taking selfies?

Every time she tried, she'd just freeze up!