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You may not remember now, but Japanese bantamweight Takeya Mizugaki was once one of the world's finest bantamweights.
After unsuccessfully challenging for then-champion Miguel Torres' WEC belt, Mizugaki began a run back up the ladder in hopes of a second chance at gold.
This run led him to Urijah Faber, a man who seems to always be involved in his division's title picture.
Many felt that a win over Faber would put Mizugaki back in contention, but "The California Kid" had other plans.
After locking in a deep rear-naked choke, Mizugaki went to sleep. Unfortunately, the choke was set up at a strange angle against the cage, and referee Josh Rosenthal halted the action too late, to say the least.
After Faber released the choke and stood up, viewers were left with a stiff and unconscious Mizugaki laying on the canvas.
Despite knowing that a rear-naked choke is not typically a life-threatening move, I think I speak for all of us when I say this was a serious "Oh S!" moment in MMA history.
For those wanting some resolution that did not catch the fight, yes, Mizugaki was fine.