Raiders use consumables for encounters. Hardcore raiders use consumables on encounters even when they're not necessary to win. Really, really hardcore raiders use consumables to win their guild's game of musical chairs in Karazhan. This video comes from the guild Soul Society on Deathwing, and is a good reminder that no matter what, you can always find weirdness and fun in WoW's instances.

Gruul hotfixed, Shatter damage lowered