This works because of the position your character is given when it jumps off is already given as it jumps off. Thus when you try and run, it will always bring you back to that spot until you land. But.
Imagine if you were SUMMONED to Teldrassil
From Tanaris?
i'll have to try this for the fun (will add a video if it works)
so i tryed it yesterday, did some cool jumps with blink
then tryed summoning stones, which works too, but as soon as you are out of sight of the summoning stone and try it you get a loading screen and end up sitting on the choppa