Fun Riddles

Question: What goes 99 thump, 99 thump, 99 thump?

Question: What is the tallest building in the world?

Question: What did the hang glider say about autumn rock climbing?

Question: What type of car does a sheep drives?

Question: Before your choose the witching hour, take care to dream the tallest tower. Than careful before you leave too soon--behold the dark and hollow moon. What's the number? (This Riddle is from the Eye of Minds, by James Dashner.)