Fun Riddles

Question: Thirty white horses stand on a red hill,
First they champ,
Then they stamp,
Then they stand still.

What are they?

Question: Mary gets in the shower, but surprisingly her hair is not wet when she gets out. How is this possible?

Question: What stays where it is when it goes off?

Question: What building has the most stories?

Question: A young woman is attending her mother's funeral. While there, she meets a man she has never seen before and falls in love immediately. After the funeral she tries to find him but cannot. Several days later she kills her sister.

Why does she kill her sister?