Hahhahaa
Sep. 22., 2010 | 07:30 pm
No:: aluka
"Medical doctor Donald Unger conducted an experiment in which he regularly cracked the knuckles of his left hand for fifty years while not manipulating those of his right. No arthritis or other ailments formed in either hand, and he was awarded 2009's Ig Nobel Prize in Medicine."
http://en.wikipedia.org/wiki/Cracking_j
http://en.wikipedia.org/wiki/Cracking_j