Freeze a Mochtroid near the bottom of the Grapple wall. Stand on it, and fire Grapple horizontally while walking toward the wall. If successful, Samus should clip slightly into the wall. Crouch, and fire Grapple while angling up. 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. If needing to stand up in the next room (e.g. for an X-Ray climb), then enter the transition while swinging slowly, e.g. after coming to a stop directly below the block (or without Gravity equipped). If needing to transition at horiziontal position $15 (as far right as possible), then additionally roll from pressing left to pressing diagonally up-left just before the transition. The game may lag heavily if Samus enters a retracted position; if this happens, hold down to extend Grapple again.