Wall Cling

Wall Cling (壁貼りつき) is an Ultimate Move performed by Koichi Haimawari using the Slide and Glide Quirk.

Description
With this Ultimate Move, Koichi is able to turn the repulsion force emitted from his limbs into a suction or adhesive force; allowing him to stay strongly attached on any surface, even though this is the one of a moving bullet train. To make this thing work, Koichi must alters the direction of the force of his Quirk.

He discovered this requirement by accident, when he jumped on a moving train, but apparently it's something he's been doing subconsciously. When he felt his body was lifting off during the turns or against a headwind, he simply repressed it.

It is not necessary for Koichi to use all his limbs for this new movement, he can use only his feet to cling himself on a surface thus leaving his hands free to attack.