I recommend watching the YouTube 1080p version of this video due to superior quality, but both the WCM stream and download are also available.

First off: This is by no means a flawless performance, but it gives some insight into how much fun Ragnaros can be and how hunters can use some of their utility moves (read: disengage + deterrence) very effectively in this encounter.

Even though it has been nerfed very thoroughly I still think it is one of the best (non-heroic) encounters in the game at this point in time.

The track used in this video is 'Gladias' by 'Haute Culture' who kindly published it under a Creative Commons license.