Never piss a Troll off.
Never piss a healer off.
Never ever piss a Troll Shaman healer off… ever.

(based on an actual encounter I had with one of our raid tanks in Wrath where he wouldn’t wait for healers. I tend to lose my cool pretty quickly when people don’t listen and he pushed it too far, and after I laid into him for about two minutes over vent he meekly said ‘Yes ma’am!’ and the entire guild exploded into laughter XD )