Good Riddles

Question: A man enters a field. As soon as he does, he dies. He is carrying a mysterious package. What is the package and why/how did he die?

Question: I sit on a bridge so you might see just how clear the world can be. What am I?

Question: What is in the middle of the moon, At the end of an igloo And goes round in loops?

Question: What can fall but never stay, something colorless with peoples dislikes?

Question: What's yours but people use it more then you?