Tricky riddles

A boy fell off a 30 meter ladder but did not get hurt. Why not?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

How can a man go eight days without sleep?

It is a city that has no people! What is that?

Who is bigger: Mr. Bigger, Mrs. Bigger, or their baby?

How many months have 28 days?

You are a bus driver. The bus starts out empty. At the first stop 4 people get on. At the second stop, 8 people get on and 3 get off. At the third stop, 2 people get off and 4 get on. The question is, what color are the bus driver's eyes?

What is round on both ends and hi in the middle?

Romeo and Juliet are found dead on the floor in a bedroom. When they were discovered, there were pieces of glass and some water on the floor. The only furniture in the room is a shelf and a bed. The house is in a remote location, away from everything except for the nearby railroad track. What caused the death of Romeo and Juliet?

There are a number of books on a shelf. If one book is the 6th from the left and 4th from the right, how many books are on the shelf?