Have 4 or fewer energy in reserves (set to Auto), take damage while going through a door, use X-Ray while entering the next room, and release X-Ray before reserves have finished filling (a 4-frame window when starting with 4 reserve energy).
This can be used for many things, including overloading PLMs to move through solid tiles, setting up a deep doorstuck, and triggering Artificial Morph if canArtificialMorph is enabled.
See also: Tech Page