"Between 1907 and 2009 (at the end of 2009 TT races period) there have been 237 deaths during official practices or races on the Snaefell Mountain Course"
Helmet cam vids from the TT are absolutely terrifying - much more so snaking through the towns where zero effort has been made to move telephone poles etc away from the course.
Also: ECE 22.05 standard helmets + kangaroo leather w/ elastomeric inserts are pretty magical. I got by with kevlar insert jeans and luckily never had a high-side before I decided to part with my donorcycle.
Badly broken left arm, two bone fractures in his back, a dislocated knee and ligament damage, bruising to his lungs and a hairline fracture to his pelvis