Break the bomb blocks then shoot a Super into the morph tunnel to break the Super block off screen. Requires pixel precision, although there are several pixels that work. The camera must be fully scrolled to the right, which may require going far left and back. One normalized setup that doesn't rely on a visual cue: perform a full-height jump and press against the overhang to the left, while holding angle up and down to lock Samus' position after landing, while continuing to hold left. This works with or without HiJump equipped.