Epic quest line in cataclysm. In the badlands Theldurin the Lost tells his story of how he decided to punch Deathwing in the face and save the badlands, and you come along for the ride.
Video: http://www.youtube.com/watch?v=M4VcMKK-ZR4
Possible contender for most awesome character in cataclysm.
Edit: Drat! looked in wrong forums and was too late, original forum here:
http://www.mmo-champion.com/threads/...ce-%28video%29
My bad...