I think I struck a nerve this morning when I went to pin my delt, never had any issues there...I do not know if I hit it to high up my shoulder or what but as soon as I pinned it my middle deltoid started twitching like CRAZY...like a muscle spasm in my striations. I immediately withdrew and dropped it about an inch lower to inject. Kind of freaked me out a little but no more than the usual soreness today.
Anyone had this happen before??