When Samus interacts with the ceiling while jumping, weird things can happen as the game tries to correctly deal with her velocity.
This can be exploited to gain height and access areas where not intended.
In the white E.M.M.I.'s zone in Artaria, instead of standing on the platform to allow water to flow in and then sliding out via the raised platform, Samus can grab onto the ledge up and right from the intended exit.
In the area of the your first encounter with The white E.M.M.I.. There is a vertical-flipped U shape platform. With a buffer wall jump at the correct height and midair melee. You can grab the ledge at top platform.
This can be used for cancelling the permanent chase phase of the white E.M.M.I. without sliding into the one-tile tunnel at the exit by performing the skip and counter the E.M.M.I.. Another application is trigger white E.M.M.I. activation if you skipped the encounter. Otherwise, defeating Central Unit will cause a softlock.
In the underwater spin boost tutorial room, A WBJ and quickly spin boost as Samus touching the slope at the right side can boost her enough to grab the ledge on top. Making an early arrival to the green portal.
At the water pit under screw attack chozo statue. You can do a WBJ at the left side or grab the ledge leading to a missile tank. Jump outward and continue space jumpz nuzzling the corner. The interaction will boost Samus higher enough to grab the ledge at the left side. Grab the ledge and jump outward, nuzzle the corner. Once Samus gains enough height to jump out the water, space jump again to land out of the water. Continue forward, WBJ and grab screw attack