12 years ago, on black ice. The time before that was on wet leaves when an Alsatian ran in front of me. And the time before that was ice again. There's a pattern emerging.
When I used to do MTB in the 90s, I had one of those high speed crashes where you see sky, ground, sky, ground. The trail was so steep and loose that there was very little impact, and I was wearing two layers which minimised abrasion. My mate thought I was dead but it's just hard to stand up when your legs are higher than your head!