The librarian whispers, They're right behind you!Observational: Why did the scarecrow win an award? Because he was outstanding in his field.Wordplay: Did you hear about the restaurant on the moon? Great food, no atmosphere.Dad joke: What do you call a lazy kangaroo? A pouch potato.Anticipation: What do you call a cheese that isn't yours? Nacho cheese!Slapstick: Why shouldn't you trust stairs? They're always up to something.Dry humor: I used to be addicted to soap, but I’m clean now.Reference: What did the ocean say to the beach? Nothing, it just waved.