Back in 1999 I had a false nuetral on my ZX7 race bike coming into turn 1 at Spokane completely wide open, didn't make the turn obviously and did cart wheels at almost 150 mph (thank God there was a nice run-off field), I was awake for the first couple cart wheels but then went black, my buddies that saw it said I must have done at least a couple dozen cart wheels with nothing hitting but feet and head over and over again and very fast... Needless to say that put me in the hospital, pretzeled the bike, and I had to fly home later that week and have mama pick me up at the airport. That was when mama no longer liked me racing...
I think I have some pics of the helmet somewhere at home, I'll try to find them and scan em in, it was toast!! But being an Arai it held up very well.