One thing I remember about the various ATC90s and 110s my friends used to have was that when they'd spit you off, they might tumble a couple times, put some knobby prints in your skin somewhere, and end up upside down in a nice big thorny multiflora rose bush. Where they would continue to idle, upside down, while you tried to figure out how to grab hold and get them out without getting thorned up too bad.
All the while thinking about how the oil pump can't pump oil if the engine's upside-down, and wondering how the hell a float carburetor can work, inverted.
edit: as an afterthought, I saw that happen to my friend, but it never happened to me. Worst that ever happened to me on an ATC (not mine) was running over my foot a few different times. I had a KLT110 for a short while but never had any crash issues with it. But it didn't run very long before I grenaded the transmission. Too bad, really; that was a pretty sweet-running little engine.