Hey- I am new to skydiving and started my PFF (AFF in the rest of the world) at Skyventure Montreal. I had a 20 minutes to learn the basics of freefall. We were working in 2 minute blocks and every time upon exiting the tunnel I felt like my should had somewhat popped out of place and I had to turn it to put it back in. 10 minutes in I just couldn't take it anymore my shoulder was so sore. Now I am injured and unable to lift my arm at all without pain. I am a bit discouraged because I wasn't able to complete my time, although my coach gave me the go ahead to start jumping I am worried about my arm reacting the same way to actual skydiving. Just wanted to see if anyone else had this problem in the tunnel- I think it may just have been because I reached for the door too soon and the pressure from the wind. Blue Skies!