Everyone has that "one thing" that makes their skin crawl. For some it is the sound of people chewing with their mouths open. For others it is the sound of nails on a chalk board. For me, it is the sound of people cracking their knuckles. I don't understand why it bothers me so much, but the sound generates a mental image of cartilage and bone abrasively grinding together. It makes the hairs on my neck stand up every time. I have recently discovered what could be considered my own personal hell. Check out the following video to hear what 1,000 people cracking their knuckles sounds like. I will be in the corner crying.