The best boss fights in WoW are the ones where your friends get MCed and you can beat the shit out of them.
[22:20:10.035] Slithals hits Garrosh Hellscream Miss
[22:20:10.274] Tevruden killed Slithals
[22:20:10.274] Tevruden Blood Plague Slithals 19816 (O: 44319)
[22:20:10.282] Slithals dies