What makes your knuckles pop?
If you've ever laced your fingers together, bent your fingers back and heard a loud crack or pop, you know what knuckle-popping sounds like. What if you did it all the time?
If you've ever laced your fingers together, turned your palms away from you and bent your fingers back, you know what knuckle popping sounds like. Joints produce that CRACK when bubbles burst in the fluid surrounding the… » Full Story on HowStuffWorks
If you've ever laced your fingers together, turned your palms away from you and bent your fingers back, you know what knuckle popping sounds like. Joints produce that CRACK when bubbles burst in the fluid surrounding the… » Full Story on HowStuffWorks
