check this out a unicycle motorized bike haha!!!

there's a guy who has built a bunch of them, there was a discovery show on him and others. He made one wheel that had a v6 in it, but on it's maiden voyage it started to wobble side to side, and that kind of oscillation is self propagating, so it got worse and worse over about 100 feet and he ended up crashing it.
Anyone ever see Junkyard Wars? TLC program back in the early 2000. One episode of that i remember the teams had to build these. It was neat, they both built one that worked in 12 hours.
 
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