So last night I was on my MW Monk and was messing around in wintergrasp (haven't been there in ages), the fight ends and I happen to run into a Blood DK (had I known he was blood I would have left). Neither one of us could kill the other and I was basically at 100% health with very little mana gone after about 15 mins, in which time a mage friend of his shows up and they take another 15 mins to kill me. I had tried to run away a few times (because I got bored) but they were hell bent on killing me and I could never get far enough away.
I should have just let him kill me once I realized that it was going to never end and I made the mistake of not using obstacles to get away so I guess it's my own fault but it got me wonder what other people's longest open world PVP fights are? I'm guessing there have been some spontaneous mega battles that last for hours.