Is It Okay To Crack Your Knuckles

How many times did you crack your knuckles while watching this Check out more awesome BuzzFeedBlue videos MUSIC Pizza Take Licensed via Warner Chappell Production Music Inc. SFX provided byAudioblocks. STILLS Dr Donald Unger Karen Quincy Loberg, VIDEO Realtime cine magnetic resonance imaging of the human metacarpalphalangeal joint undergoing traction. by Kawchuk et al. is licensed under a Creative Commons Attribution 4. 0 In