Well today I was bored waiting for the world event to happen and went and climbed a rock near the dead troll guy's spawn point. I'm a tank and when i was on top of the rock whenever I taunted him he went into evade mode for ~ 20 seconds at a time, I got bored, waited till 10% later after the screeny and then jumped up when he had aggro on me and he DESPAWNED and the event reset completely!!
http://anyhub.net/file/wowscrnshot_090910_203319.jpg
Have fun with this while it lasts!