Which room??

A murderer is condemned to death. He has to choose between three rooms: The first is full of raging fires, the second is full of assassins with loaded guns, and the third is full of lions that haven't eaten in 3 years. Which room is safest for him?

which way does the smoke blow?

If an electric train is going 150 miles per hour north and the wind is blowing the same south, which way does the smoke blow?