Good Riddles

Question: What do you call a cow that eats your grass?

Question: What did the banana do when the monkey chased it?

Question: A man entered a house. There was no one else in the house. He walked in to a room, stopped, and slowly raised his hands above his head. After a moment, he turned around, let out a laugh, and left. Why?

Question: I'm just a lot of nothing but I'm every were... what am I?

Question: What has four eyes but can't see?