Freeze a Mochtroid at a specific position, aiming for its top to be slightly above the midpoint of the fourth Grapple block below the door. Stand on the frozen Mochtroid, 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. Press jump to get a good bounce off the wall at the bottom of the swing, making it possible to swing up to the door. To minimize lag, when grapple is extended horizontally release all inputs other than shot/grapple; there will still be a bit of unavoidable lag while Grapple is initially extending. Try to get a good first bounce; otherwise heavy lag may be difficult to avoid, and it may be better to retry from the beginning. Pressing right while inside the transition tiles will trigger the transition. Continue holding Grapple through the transition to initiate a teleport in the next room. If it is needed to trigger the transition further to the right (at position $6EE), then wait to come to a stop before pressing right. If it is needed to trigger the transition further to the left (positions $6EB or $6ED), then hold right while approaching the door. Either way, Samus should automatically be able to stand in the next room (e.g. for an X-Ray climb).