Not a lot on bikes....but;
'boarded flat-out down a glacier known for it's thin powder and many crevasses.
Gone looking for a riot in Caracas and found one.
Cliff jumping into shallow water when young.
Played with my genes in the early 90's.
Tried to keep up with someone on wets at TA3.....
I'm sure there's some medical term for risk-loving folk like us. I'd look it up but I'm too busy juggling hand-grenades while practising stoppies on a harley.
Cheers,
Ali