Get a boost from a Bomb or Power Bomb while grappled to the top half of the turret above the door. Without HiJump, this is most easy to do by positioning as far right as possible on the ledge and performing a stationary lateral morph. Lay the Power Bomb relatively low and continue moving right for about another half a tile. turn around left while morphed, then unmorph after Samus begins to descend, to reset Samus' fall speed; hold angle-up, and wait a moment after Samus is unmorphed before using Grapple (to wait until the bomb or Power Bomb is about to explode). Press and hold down soon after the Grapple attaches. Samus will enter a 'glitched grapple hanging' state where Samus' graphics will appear corrupted while swinging with Grapple. Swing down, and hold left while approaching the door to trigger the transition. Continue holding Grapple through the door transition to initiate a teleport in the next room. Samus should be able to stand in the next room (e.g. in case this is needed for an X-Ray climb). Samus can reach the transition at horizontal position 20, or at positions 19 or 21 by pressing up at a specific time just before reaching the transition.