Perform a horizontal shinespark through the door transition, from a horizontal position that triggers a deep transition in the door. Sparking from one or two pixels away from the door is an example position that works (if possible in the neighboring room). In general, about one third of positions will work, with working positions occuring in periodic windows that are each approximately two pixels wide, separated by bad windows that are approximately 4 pixels wide. If successful, Samus will spawn inside the Power Bomb blocks. After the shinespark crash animation ends, Samus should be standing and able to X-Ray climb.