I tried searching but I couldn't really find much because this seems to not be a very common thing. My one buddy who smokes a lot of crack has this weird thing where his jaw will open down and either to the left or right. When this happens the jaw is pretty much stretched as far as it can. I've always heard that this is a side effect when you smoke a lot of crack. Now I don't smoke a lot of crack (4 times, most recent being about a week ago, time before that was October 2010), but I do enjoy a good line. I've noticed that whenever I'm sitting on a bus or in class my jaw will move side to side. I don't purposefully do this, I dont even notice until my jaw is already fully outstretched. Is this truly from doing cocaine, and will it go away?