The alien uses levitation and telekinesis.

The Electrostatic Levitation Furnace in the Japanese Kibo laboratory module heats samples to ultra-high temperatures to observe thermophysical properties difficult to measure in Earth’s gravity.

They say that many Buddhist monks have exceptional abilities like levitation, abandoning the body and later returning to it at will.

Superconducting magnets can be used for the levitation of high-speed trains.