I'll never forget the months in elementary school where grade seven students became aware of physics became aware of the power of compressed air. I have no idea who passed down the sacred knowledge of the Bic Pen Orange Peel Gun, but it surely was the bane of many a teacher's existence at my school. It was MacGyver before the show existed. They actually banned oranges for a short period of time from lunches because they were finding mini orange peel bullets everywhere - plus, it was easier to ban orange peel than pens. You would be shocked at how much fun these could be in a school that was designed "open-concept". One could launch peel from the Grade One area to the Grade Six area with a proper arc and sufficient thrust... sorry... that sounded dirty. I hope my indiscretion didn't cause this post to lose its "ap-peel".