UPDATE: Details on the severity of it are in, and they're bad. Really bad.
WWE World Heavyweight Champion Seth Rollins worked a match with Kane at today's WWE house show in Dublin, Ireland. During a sunset flip powerbomb right at the finish, he appeared to land awkwardly and his knee collapsed in. He did complete the move and the match, but had to be helped to the back.
Damn man, @WWERollins might be injured. #WWEDublin pic.twitter.com/R5ZstuXW3X— Joan (@joantweetswwe) November 4, 2015
Here he is getting helped backstage. #WWEDublin @WWERollins pic.twitter.com/O3aLGhdgpR— Joan (@joantweetswwe) November 4, 2015
We've reached out to WWE for comment and will report back with any updates. Here's to hoping it was just a bad landing and he didn't injure his knee.