An extreme amount of pain. MRI forced my arm over my head and that stressed my shoulder and whatever is wrong with it. I had to stop the MRI twice. I've never had to do that in the 30+ MRIs I've had. This pain felt like my arm was being pulled out of its socket. It hurt before they scooted me in, but I tried to just deal with it. I believe I have a high threshhold for pain too. I mean, both times I blew out my knee I laughed. It hurt, but meh. This was infinitely worse. I told them to make notes so my doctor realizes the shoulder is a much bigger deal than he seems to think. This was NOT awkward stretching pain.