I thought it would be cool to start a thread w/ some brain teasers. this is how it works. i'll give one to start off w/. whoever gets the right answer first posts one of their own, and so on.
here's an easy one to start off with
How can you throw a ball as hard as you can and have it come back to you, even if it doesn't hit anything, there is nothing attached to it, and no one else catches or throws it?

