BUMP.
I asked many and most got it wrong. Don't cheat as it ruins the purpose of the thread.
Your last good ping-pong ball fell down into a narrow metal pipe imbedded in concrete one foot deep.
How can you get it out undamaged, if all the tools you have are your tennis paddle, your shoe-laces, and your plastic water bottle, and neither the bottle nor does the paddle fit into the pipe?