As you rightly indicate UFO a trick, and no "powers". Houdini had a similar stage trick many years ago.
From an engineering/science approach, the performer's C of G must be above a point on the ground, under the carpet) and connected to that point by a supporting cantilever design in the form of a hinged body frame support which slots into the "stick" which then fits into a retractable/hinged support mechanism, probably within the stick body and then via a suitable plate beneath the carpet.
The principles are basic, the engineering interesting, and the performance excellent.
Did you notice (and commented upon) the awkward walk off the stage afterwards. I suggest the body frame restricting free movement.
