Ok, today I did my workout, which went like this : deadlift, OHP and weighted pull-ups. I was doing pull-ups with 17kg, and the third one I did there was a sharp pain in my shoulder, as if my muscle was being tore. I stopped, and the pain stopped. I haven't done any more today. There is absolutely no pain at all now, so I think there is nothing wrong, but I was a bit frightened for a moment. Last week I was doing it with 16kg and there was no problem, now I'm considering retrying in 2-3 days. Anybody had this before?