Good Riddles

Question: There are 31 horses on a cliff, first they jump into the air, then they come down and stop, then they stand still.

Why do they do this?

Question: You're stuck in a room with no way out, no windows, no doors, and no roof. All you've got is an apple and a knife. How do you get out?

Question: In Michigan you cannot take a picture of a man in a green hat.

Why?

Question: Ripped from my ancestors home, beaten and burned, I become a bloodthirsty killer.

What am I?

Question: One falls but never breaks and the other breaks but never falls?

What are they?