This we kinda stumbled upon after messing around with the Flying Bunny trick...
Flying Bunny<33
Basically what you do is Cast Blossom Branch on a friend immediately after they are turning into a sandstone drake, this will cause them to turn into a Bunny once they are a Drake as seen below.
[spoiler][/spoiler]
Now, once your are a bunny Equip your Burgy Blackheart's Handsome Hat and you will turn into Burgy Blackheart which is mountable.
[Spoiler][/spoiler]
You can also do this as a single person mount if you wish to just run super fast as a gnome or fly around as him also.
One last little tidbit of fun you can have with this is to relog and remove you Burgy's hat only to see Two Sandstone drakes stacked on one another... I believe this is just a client side bug, i didn't have anyone on to confirm if they could see it too or not.
[Spoiler][/spoiler]