Freeze the island Choot when it is at the far left of its second-highest swoop. Run right-to-left on it and perform a last-frame jump into a max-height spring ball jump. Getting the highest possible run speed requires starting from the right-most 87.5% of the last pixel (subpixel position at least $2000). Press pause at the same time as starting to run, or slightly earlier, and perform the mid-air morph quickly; timing the pause to hit as early as possible after morphing will maximize the time that Spring Ball is equipped, boosting Samus' horizontal speed and making it possible to clear the corner of the ceiling.