Crashed and burned motorcycle racing.
It was largely a pleasant experience, no pain until later. Since I didn't think I could survive, my only fear was having a spinal inury or something worse than death.
Funny thing - I was a bigtime smoker back then and I came too to find a horde of people staring at me and the ambulance on the way.
I casually asked the crowd who had a cigarette, selected the best brand, and smoked it there on the pavement while I waited.
