Climb the top of Red Tower with just Space Jump. This can be done by dodging the Rippers and shooting the block as Samus is going upward, so she goes through the block as it breaks. HiJump or killing the Rippers can help but are not required. If the Rippers are killed, this can instead be done by shooting the block while falling right as it goes off screen, then using well-timed short space jumps to go up as rapidly as possible before the block respawns.