Bilateral Thinking Puzzles

Q: A man is lying dead in a field. Next to him there is an unopened package. There is no other creature in the field. What happened?

A: The man is a knife-thrower in a circus act, and was seen leaving an optometry clinic.

Another

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