Cube Farm Ordnance?

In a humorous departure from the normal question fare, B747SP asks: "In my office, we have a healthy disrespect for the comfort and safety of our colleagues, and the accompanying arms race is strong, and competitive. We've tried everything from hurling balls of paper back and forth, to stress balls, flying torpedoes, Nerf weaponry al-la thinkgeek.com, and even Air Soft guns (I did say no respect for safety!!!). OK, so that's my office. What about other Slashdotters? What ordnance do you use in your office to keep that sucker in the next cube on his toes? Do you build your weapons from stuff around the office, or do you buy from a store?"