The UFC 148 bout between Dong Hyun Kim and Demian Maia was expected to be an excellent matchup, but an apparent injury to Kim brought an end to the bout in under a minute. Joe Rogan speculated that Kim had broken a rib and it certainly looked that way, but apparently that's not the case. He just suffered a major muscle spasm. Kim's translator Brian Rhee went to see Kim in the hospital and posted the full story on the UG:
"The injury actually occurred about 30 seconds into the fight when the fighters were on the opposite side of the octagon. Maia had one of Stun Gun's legs, which is a position that he actually likes. As they were tied up, somehow Stun Gun got a muscle spasm in his side. He told his corner that something was wrong. Kim defended Maia's takedown attempts for a while, but by the time they got to the other side of the Octagon, he was in too much pain.
The position in which the injury happened is the kind that happens in training all the time, but for some reason it caused a severe muscle spasm this particular time. It truly was a freak accident. It's a terrible way to lose a fight and Stun Gun is really bummed out about it. I'm sure he'll be back and going strong soon enough, though!"
That sucks for Kim, but the silver lining is that it's not serious and he should be able to return soon. Will the UFC re-book a bout with Maia, or go in another direction with Kim? I'd personally love to see them rematch.