It's stuff like this that keeps the game fresh and interesting to check up on and follow. 10 man guild Check Please took some time out to perform an insanely quick kill of Amber-shaper Un'sok in Heart of fear, at least from 70% to 0. In case you weren't familiar with the fight, the trick is to spend a LOT of time in phase 1 and stack debuffs on the boss with Amber Strike, which you get from becoming a Mutated Construct through Reshape Life.
The challenging part is the extremely tight timing on this, as he switches phases on 70% and that big molten thing (Amber Monstrosity) you see coming from the right gives the boss a 99% damage reduction while it is alive. So the window to get him down is before the add reaches him and after you enter phase 2 at 70%, in this case 18 seconds.
Now, while that might not seem impressive or skillful or whatever to some (seems plenty impressive to me), the cool part about it is that they made the effort to try it, and for no other reason than to see it happen. And we can't deny that seeing a current tier Heroic raid boss go from 70% to 0 in 18 seconds is damn entertaining.
I just really like these creative things people do inside the game, showing us all that it isn't just about the mindless farming after progress and there's a ton of fun things to do, you just need to be a bit creative. So if you know any similar cool things that are being done out there, share them with us, cos we'd love to see more of that!