I think the best thing to do is to see a doctor, unless you can't?
I have very limited medical knowledge, so here's what I suggest:
1. Find something small, round and hard to bite.
2. Take a bottle of alcohol, and pour it gently over your shoulder.
3. Clench your teeth, and, using a butcher knife, slowly make an incision at the shoulder blade.
4. Disregard the pain as much as you can, and use a sawing motion to cut through bone and flesh until you reach the inner muscles of your shoulder.
5. So we can see past the blood, take some green paint and a paintbrush, and outline the edge of each muscle you feel.
6. Take a picture of your shoulder, and post it here. We'll compare it to the muscles of an unfortunate pedestrian that comes close to our house, and see which one is torn.
7. Go to the supermarket, shoulder still sliced open, and pick up some superglue and duct tape. Go back home, and follow our instructions to seal the damaged muscle and your arm.
8. In case of pain after the procedure, tell an emergency room operative everything that happened so he can laugh his ass off.
If that doesn't seem right, you should really see a doctor.
[This message has been edited by Silicone Ruff Jr (edited 07-18-2009 @ 02:44 AM).]