In Return of the Jedi, Vader throws his lightsaber at Luke causing the catwalk come crashing down. Luke uses this in his advantage and hides from him under the throne room platform. Unable to locate his son, Vader tried to lure Luke out of hiding.
But how could Luke conceal himself from Vader in the first place? Did he use a Force power of some kind to blur Vader's sensors? I mean, the underneath of the platform was pretty much an open space with very little possibilities for hiding. The only places I see in the movie are the openings on the both sides of the floor (pointed by the yellow arrows):
The background of a close-up to Luke doesn't give much of a clue (although there is a round shape which could be the bottom of a window frame):
But as Luke reveals himself, he appears to be beneath of the staircase to the dais, right in the middle of it:
There's no way he could have hidden there all the time, because just a couple of seconds before, Vader walked towards and stared at the very same spot:
My first ideas were that Luke used the Force to make himself invisible, or to teleport him to the position. But after taking a look at one of the cross sections of the Emperor's throne room, I assume Luke could have slid almost straight under the floor of the lower level (yellow arrow) and then later Force Dashed back to the staircase (although we don't see it in the movie, and I'm not sure if Luke knew the ability):
Does someone know better?