Okay so I did some researching and found no posts stating this.
Okay so if you are horde there is a spot in Orgrimmar you can get this achievement at. If your a rogue with the safe fall ability this makes it easier for you (especially with the glyph). Now what you want to do is take the elevator to the flight master and face Grommosh Hold, now there is a certain spot you wanna face for, it that is the spot where there are 3 chickens, you will want to jump and miss that little hill thing and this achievement should unlock, feel free to fine tune it so that it works.