jump up, become absolutely horizontal (put your hands on your sides, like a tick in the air!!), then fall down, like a stiff board, so that all parst touch the ground at the same time. [flemm]
You have to be nuts to actaully do this on anything less than a mat, trampoline, or in the water. ------------------------------ you mean IF you have nuts you shouldn't do this :P
If you do it properly, it shouldn't hurt .. you kn ow, spreading your weight out over your entire bo dy would end up lessening the blow considerably i n each area ... it's only if one part hits the groun d first, that it'd hurt like hell. Even if you do it on concrete, theoretically (i believe) it shoul dn't pose much danger. (Again, if done the proper way)
these are also called suicides in breakdancing , you should lessen the impact by having your hand s amd feet hit an instant before the rest of your bo dy, that way you feel very little impact becuase i ts spread out across your whole body, this works l ike the old bed of nails trick, the force gets dist ributed