That looked almost like a dislocation. Like the groove slipped for a second before realigning.
That's not good at all, especially not with the style he wrestles.
Edit:
On the flip side, he finished the match so maybe it's not as bad as it looks. Reoccurring dislocations are easier to shrug off but if it's your first time, even if it pops back in immediately, you aren't getting right back up, much less power bombing a 250+ pounder.
Then again, I guess in his situation, adrenaline could carry him. Hopefully he's fine.
He and Reigns would/will put on a good one at SS.