Good Riddles

Question: what comes in hard comes out soft and you blow ???????????????????????????????????????/

Question: 4 people fall out of a boat and only 3 get their hair wet.

Question: I am as thin as paper, smaller than string. I blow in the wind. What am I?

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: The mouse that can walk is Mickey. But the duck that can walk is who?