non, but i crack my neck a lot. feels excellent, nothing like a nice loud pop.

Not in the traditional sense. I do make a fist and they crack.

As a kid I envied the moment Rambo clutched the transceiver in the POW camp, his first cracked around the stand, and he said "Murdoch. Im coming for YOU." I can pretty much do that now, but its not as cool as when Rambo did it.

Nitrogen does it.