Fun Riddles

Question: What has ears, like a cat and a tail like a cat, but is not a cat?

Question: What goes 99 thump, 99 thump, 99 thump?

Question: What is the tallest building in the world?

Question: i have a house but it doesnt have a door?

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?