Ok, i know its not a bad habit but whenever i sit down i always have to tap one of my legs on the floor, continually, to keep me focused on something. So whats your bad habits?
Not for me. I do it all the time.. I crack a lot of joints.. Knuckles, neck, back, toes, knees. I can crack others but it's not really a habit. The biggest ones are knuckles and neck.
Kids may develop a habit of cracking their knuckles because they like the sound. The "crack" comes because of a change in the synovial fluid, the lubricant that bathes the joints. When finger bones are suddenly stretched apart, the space between the joints widens, and an air bubble forms in the synovial fluid. The bubble quickly bursts and makes a sharp sound.
For me personally, I'd like to say this thread is a bit pointless, but my bad habit is chewing on a pencil at school or whenever. (no not the whole thing, just the eraser end!)
