This is not that great of a bug which is why I'm posting it in general, for if anyone wants to attempt to improve upon it in some way or try to find an exploit with it. I was recently playing Old Hillsbrad with my feral cat druid and noticed I could recreate this bug that let me use all of my cat abilities in "human" form (because there's no night elves in Old Hillsbrad it changes you to a human druid).
1) Start in travel form (not cheetah glyph just standard). For the record I am using Glyph of the Stag (ridable druid glyph) just in case that matters, but I don't think so.
2) Use the talent Displacer Beast. It will not turn you into a cat as it's original intention, instead it will turn you into a human.
And there you go, you can frolic around using all of your abilities as a human. I haven't tried it with balance druid yet but I assume it works with that too. I'm still testing this out hoping to find a way to recreate this bug outside of the instance.