The one that really worries me is the prospect of getting the pointy end of a clarinet stabbed down my throat when playing it on the move. I once had to play a street band musician in a large community drama, and I insisted on being at the very front so nobody could bump backwards into me.

A friend of mine had a severe stroke while playing the Highland pipes - basically he exploded from the pressure.

Ihave heard of bellringers being pulled up into the air by the ropes (usually you just get your arm and shoulder wrenched, but I think somebody died that way a few years ago, getting hanged upwards) or having bells fall on them.

I'd guess the instrument with the very worst accident potential is the steam calliope.