So I was flying about around the coast of Kun Lai the other day and about mid way up a green cliff, I saw a tiny little hozen doorway. I went up and had a look and who should be inside but Grohl Grohl the Drum Master. I love it when Blizzard includes little references like this! He's a Hozen that runs around banging on the drums in his secluded home, changing between drums every few seconds.
And keeping with the musical note, why is there a chicken in Mistfall Village with a little guitar and what I can only assume is a tip jar?