(Drs tell me that pain signals travel round the body at about 40mph)
I'm not sure this thread is heading in a pleasant direction, but I seem to remember many moons ago an RAeS lecture by a bod from the AAIB, who said that when a cab hits the ground, a shockwave travels back through the aircraft at the speed of sound, breaking up the structure, and much of the pilots senses before he's started to move out of the seat...
N: