Good Riddles

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

Question: Railroad crossing without any cars. Can you spell that without any R's?

Question: 5 bricks construct me, you'll find a candle in the middle. I am the antithesis of heavy, Without me you couldn't read the riddle. What am I?

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

What are they?

Question: What is brown and sticky?