So I was messing around with a bug I found last month (this isn't actually related to it) and discovered something hilarious while using the new Obsidian Nightwing Recruit-A-Friend mount.
The picture below should show you exactly what happened...
I entered one of the Caverns of Time instances while on the mount, and the Human Illusion buff seemed to be applied on top of the mount buff, leaving me running around like a Worgen! (I play an orc normally).
So I had the great idea of trying to mount it with my other account. Whoops.
Ok, this isn't much of an exploit, but it's good fun to play around with anyway :P Definitely not working as intended.
Edit: Just found out the animation is the original Worgen mounted animation from Cataclysm Beta... fun fact
Edit 2: Thanks to Rayne749 for the theory on this! Any transformation buff that is applied by someone or something else without dismounting you will work for this. Simply follow the steps used in this thread (Stay In Any* Temporary Transformation Permanently) after acquiring the transformation, and you will become a perma-transformed, flying, mountable version of the transformation!
Pictures of what Rayne749 suggested below:
![]()