ok, so i teach high school physics, and this was one of my questions for today's assignment.  i'm quite proud of this one, as I got a groan out of the entire class for it.

A hummingbird is hovering 10 m above a sports fan at a baseball game.  Being a mean-spirited bird, it decides to poop.
Q. How fast is the poop moving when it hits the fan?


hee-hee, i'm such a dork ;-)