Good Riddles

Question: what is a cow moving backward?

Question: One day, a woman was walking through the woods and there were a group of 5 kids and a man with music. At that moment, it was quiet. The man said to the kid that moved, "sit down." All of the other kids were dancing when the music played and they all won. The woman walks away and goes about her business. What just happened?

Question: What kills a lot of people but is harmless?

Question: What grows shorter as it grows older?

Question: There are 2 brother's, the oldest is 4 yrs old. The little brother Is 1/2 his age. When the big brother is 100 how old will the little brother be?