When I was about 10 or so, my Dad was giving me a "lesson" on auto care by letting me help him change the oil in his car. You know, one of those farther-son Kodak moments. When we finished with the car we had a small pile of 6 empty oil cans (yes kids, motor oil used to come in a real live metal can). As any dutiful son would, I asked ole' Dad what was to be done with the cans? Well, he just got this sort of wicked grin on his face and said, "Why don't you go round up a can opener, a bottle opener, and a punch". Not knowing what was in store, but also trying to dodge a "lesson" in grass mowing, I went into the house and found the items he'd asked for. When I came back out I noticed Dad had gotten a roll of duct tape and some lighter fluid from the garage (some of you may know where this is going). Dad went to work on the oil cans, cuting various secret patterns in the top and bottom of each one. Once done with his metal work, he asked for the duct tape and began assembly of what my Mom would latter call simply, "That damn thing".
I'm still not sure of the exact order of the combustion chambers in "the thing", but I do recall that the last two cans on the end were cut top and bottom to form a tube, and the first can was cut out at the top with a flash-hole the size of a phillips screwdriver in the very bottom. The middle three chambers had a series of triangular holes cut both top and bottom with one of those juice can openers.
Well, Dad got this thing put togehter and found one of dog's old tennis balls, which he asked me to hold for a second. He fliped this device over, opened the cap on the lighter fluid and proceded to empty about half of it into the bottom chamber. At this point, he picked up "the thing" and turned it end to end letting that lighter fluid spread and vapor up real good. He then planted the butt of "the thing" in the ground at slight angle, told me to drop in the tennis ball, which I did, and stuck a match to the flash-hole. BAWOOM! An air cannon. That tennis ball flew about 200ft in the air accompanied by a very impressive fire ball and one of those concussive sounds that give you a warm "I think I'm gonna' pee myself feeling".
I think that was the first and last time I ever saw my Mother run as she came flying from the house to if there were any pieces of us left. I also think that was the most upset I've ever seen Mom get. She used some words I would only later learn the meanings of
I don't think the gleeful laughter that neither I or my Father could hold back helped her mood much.
We never shot the air cannon again after that......At leat not when Mom was home
------------------
Tom Whitman
SSgt, USAF