It sounds like a knee popping
, but I hear it in my head, It stuns me for a second, it is painfull, I feel it and hear it, but don,t what it is, if this is major and if anyone else has this problem. I do know that it can be heard out
loud by others nearby (though not by me, it is loud inside my head). I do also have a syrinx at T5, and liesons on my brain (though not sure yet what they are).