One of the most outstanding UFC events ever! St. Pierre vs. Condit was a surprise, a five round drag-out bloody war between the two best welterweights the UFC has produced. Personally I thought that whoever the winner was going to be would make it happen within the first 3 minutes of the first round. But, I ate my words as I saw Condit strike from unique angles and deliver a left kick to St. Pierre's head which he damn near turned into a TKO. UFC 154 is the best example of MMA skills, raw athleticism, and desire to win that I've seen in the past decade.
All that being said, Johny Hendricks knockout punch to Martin Kampmann was one of the most impressive knockouts ever delivered. It ranks up there with Jon Jones choking out Machida as far as overwhelming power goes. Skill and artistry are important, but who doesn't like seeing a vicious 46 second knockout delivered?