A friend of mine conviced this kid he could pop any bone in his body, he would have in his hand one of those listerine pocket packs and snap it and coinced the poor kid he could snap the middle of his arm, which is imposible beacuse there is no joint there.

But on topic, I could never crack my knuckles, but I could do it to othere joints, like my neck an shoulder/arm.

If life is unfair how come I haven't won yet?