abgd - Thank you
My mind returns to the accident report where our man makes a perfect forced landing only to split his head open on the altimeter subscale knob... or the other 'perfect' one which ended with a chap bouncing his head off the cockpit in three places hard enough to split his helmet (this one survived.)
At the end of the day I suppose it's like aircraft parachutes... nerdy but when the time comes I bet you'd rather have one than not
