@Deloreandudetommy  
Yes I know but why not just float instead of stand :P

@Saphire Systrine  
He has a little control inside the glove he has on his hoof (and uses standard Magical Hoof™ powers to operate it).  
I based the system off Virtuality’s VR systems from the early 90’s, which used a handheld controller for hand tracking (very impressive for the time and not that conceptually dissimilar to a modern VR controller) and character movement. I tried to make something that’d be similar but also make sense for a pony to use.  
 
(I promise this is the best picture illustrating this that I could find, though I based mine off an earlier model)

so like……….. the unicorn can just make themselves float, no need to have the tread thing. o3o