I seen this and couldn't believe it. Just 3 short tiers (2 1/2 really, was ToC even a tier? :P ) a Blood Spec'd DK goes into Ulduar and solo's the final boss. He burnt down the brain phase amazingly in one phase. That means he did more DPS than guilds of that tier did in three phases. (source)
Below is the video, simply AMAZING! Gratz sir, on such a great accomplishment.