I just had the greatest experience in any game, evar. EVAR.
Doing Mayhem in the market, so I go to Marketplace and go LFP. We get 4 guys, got bored of waiting, and take 4 hench. I was restoration rit, and our only other healer is sister tai (lol).
Of the four players, one was a sin, one was a 15 mesmer, and the other is the jerk. A Warrior if it helps.
Basically, he states that he wants to do the undercity part. Everyone else in the party hasnt even begun the quest, so we ask him if he can help with the wajjun bazaar part. He agrees so off we go. After a bit of fighting in wajjun, he leads us into undercity. In fact, I didn't know wtf happened until suddenly the Undercity loading screen popped up.
There were lots of wtf?s, but he assures us that the quest can be completed by talking to the people in the undercity. So, ok we believe him and we go. Lots of fighting, and I was doing my job rather well so no human player died (cant say that for silly henches). During this, he was starting to show his jerk side. Mainly, ordering us about, calling people idiots when they don't immediately do what he says (like LURE, BACK, HEAL and rubbish). Everyone was mildly pissed with him, but well it was alright. We reached Jinzo and Togo, and they don't say anything about the quest. Hmm. He makes some excuse, and I say ok just get us to vizunah or something. So alright. Continued fighting, we did well (he even said so), and in the process pissed me off. He called me a dummy when I died, and when I said I at least deserved some gratitude for keeping the party alive all the way, he made a sarcastic comment ("I forgot bout that"), and made fun of my name (Ariel moonriver, he called me arrow maker).
That was kind of the last straw for me, and the other 2 people in the group whispers me that theyve had enough of the jerk. So I start dancing. The group heads into the next fight, and all of them die.
I pissed the jerk off as much as I could "The arrow maker is tired, the arrow maker doesn't dare to fight" and stuff like that. After like 5 minutes of him begging, I rezzed Sister Tai.
Then I repeated the process. The group dies again. So I make him beg to rez tai. Then I leave them alone in a fight again. Repeat. In the end the other 3 human players ran out of the fight and left him and hench dead. We all started dancing. He cursed at us and quit.
Some may say I'm being the jerk. Well, he pissed everyone off, and everyone in the group agreed. After he left, we congratulated each other lol. That felt real good

Oh, and this is what being the only functional healer in a party can do