I guess I've ended up in the emergency room twice, from downhill speed that exceeded my ability to negotiate curves. One just a concussion, more recently a brocken neck.
These days i usually limit max speed to 40mph, and I'm more cautious with curves. Can't beat downhill twisties for fun though.
To think i did a fast twisty night descent a couple years ago, using my gps screen to see the approaching hairpins. Actually i had two gps units, one zoomed in for the next twistie and the other zoomed out. Yeah I wouldn't do that now. Or at least i think i wouldn't...