If you ever want to see ingenuity at its best, take in a hillclimb, there are some uniqe bikes. I've seen a rear wheelthat had shovels welded to it in the place of a tire, talk about scary, then there was a 3 cylinder WWII drone motor stuck in a bike frame, a serious bunch of innovators, seems like its more of a northern sport, maybe hillclimbers have to much time on there hands during those long cold winter months. Even the kids take it serious the attached picture is a YZ 85 extended, running a paddle tire and if you look closely by his left leg you'll see the nitrous bottle.