Enter with at least 1 tile of run speed from an air room, with Speedbooster unequipped. Jump from near the end of the runway (though a jump from 1-2 tiles away from the end can still work). Press pause while crossing the narrow first sandfall, then perform a lateral mid-air morph after exiting the sandfall. Equip both Spring Ball and Speed Booster, and perform a mid-air Spring Ball jump at somewhere close to the maximum height. Unequip Spring Ball while descending through the wide second sidefall.