The Moon: Earth's Sneezeguard
Mandi Walls writes "SF Gate is running an article about looking on the moon for pieces of Earth that may have been knocked into space by collisions with asteroids, etc. The article claims the guys responsible for the idea came up with it while stuck in traffic. They were probably digging for change for a toll in the seats."
Let's just wait for these Earth rocks on the moon to be sent back to Earth by the same process. :)