heh,
I'll share something stupid I did with a pump bb gun many many years ago.
I was in my teens, or early twenties. Had a 10-pump bb gun, at 10 pumps the bbs were unbelieveably nasty. We had an above ground swimming pool to the one side of our house, and this bird house on a high metal pole to the other side. I used to love to pump the gun a few times, and shoot the pole from our garage (prob about 75 feet). It would make this neat Kathwang! noise. One time I decided to pump it 15 times and shoot the pole to hear how loud it would be... I hit the pole, got a gratuitious KATHWANG! click... Turned to the left to see where the click came from and saw that the BB had ricocheted and punched a hole in the pool, about a foot up from the bottom. It looked like it was peeing. Well, needless to say, it was a bit hard to explain...
Moral of the story is that though it is a BB gun, it is still a gun. Be careful!