You been punked! Torrn AC joint! I did that shit a few years ago and gotta say its a bitch. The good news: if its third degree and under, you're fine- you don't need surgery and will just have a decent period of rehab. If its 4th and up, aka 5th, you're going to have to have surgery. On a serious note though, go see a doctor. I 5th degree seperated my AC joint and had surgery a few years ago. The tough part about it is it doesn't hurt very bad when you fall or afterwards, but Iits a bitch to have surgery on. I've got a cadaver ligament (dead person's ligament) pinned through my collar bone now. If its super bad, I'm guessing you can see you collar bone sticking up by/from your shoulderand almost coming out of the skin.
Really go see a doctor. Originally because it didnt hurt that bad I thought it was just a minor injury- afterall it doesn't hurt very bad. Turns out I had to have a dead persons ligament put in my shoulder and a few screws that were drilled through my collar bone.
One additional question: did you fall going forwards and push on your shoulder/face and eventualy faceskid/frontflip out of the landing?
Had a few too many today, butg seriously have that checked out. It sounds wayy too similar to what happened to me.