I worked at a bike shop where about one friday a month, aftre hours, we would take a bike that was not even worth giving away - and we knew this because we would leave it outside with a "free" tag on it and not even the homeless guys would take it - and just drink some beers and do whatever we could to just destroy that bike. This included the "hammer throw" - into a concrete block wall, heaving it as high as possible and letting it hit the pavement, bending it in an old maple, driving over it with one of the other mechanic's much loathed Ford Festiva (junk crushing junk).....it was far and away the most cathartic thing you could do after wrenching on people's crap bikes all month. It really kept us civil when working on customer's bikes. Plus, we made some very interesting objets d' art...