Bilateral Thinking Puzzles

Q: A man rode into town on Friday. He stayed for three nights and then left on Friday. How come?

A: During a forest fire, a fire-fighting plane had scooped up some water from the lake to drop on the fire. The man was a diver who had been swimming in the lake.

Another

This is another thing that seemed funnier a third of the way into writing it, from the Surrealist. 19th August 2005.