Riddle:
You want to cross a bridge, but there was a guard in the middle of the bridge. It would take you 30 minutes to get to the middle of the bridge, the guard would wake up and tell you "Turn Around" What would you do to cross the bridge?
Riddle: An electric train is going twenty miles/hour up a hillside of a forty-five degrees upward. The wind is blowing downhill at a speed of thirty miles/hour. What way will the steam from the train go?
Answer: There is no steam, it's an electric train!