This is me soloing Anzu (the Raven Lord) as feral in ~10mins. Vid also explains how to do it without going into details thou. Gear you need is prob some epics + level 80 blues, but then you prob wipe somewhat until you get hang of it. Gear I used was ulduar 25 man epics + relentless stuff. Clip was done in 2 hours so not much editing. Song used is Pain - Injected Paradise.
This is without any special buffs. With other buffs+flask and when everything goes right this can be prob done in 8.5 minutes.