Run from the ledge into the open doorway while hitting the frozen crab and the door transition simultaneously, just as the crab thaws and touches Samus during the transition. Note that this requires a precise freeze (2 pixel window), a small pixel starting window (approximately 2 pixel window), precise thaw timing, and a 50% success rate due to collision oscillation. The positioning of the crab is where its hitbox is one or two pixels away from the edge of the door frame, so that Samus can clip into the wall and stand as she touches the transition.