This is one of my worst hot-spots. Thumps so hard, you can see it through my coat. I showed it to my co-worker once, and she went, "EW! What is WRONG with you? Do you have an electrolyte imbalance?"
LOL.
No worries, you're in good company, present company notwithstanding. JK.
I had this twitch for a month everyday. I drove me nut's. It went away and now I only get it once in a while. I do get the rapid firing one's and the thumping one's somewhere on me throughout the day. It will subside.