So this is a small bug with some possibilities for potential.
The only thing required for this to work is for you to click the Gleaming Crane Statue - Object - World of Warcraft
which can be found on the timeless isle.
So what you do is click the statue and receive the slowfall buff it gives you to collect as many chests as you can. however when your at the desired hight before the buff runs Mount up with you desired mount When the buff expires instead of dropping you towards the ground you will remain suspended in the air.