Also known as: バウンドマン
One of the forms of Gear Fourth used by Monkey D. Luffy.
Luffy's proportions become warped, and his body becomes much larger in size, with his arms, upper torso, and legs coated in Busoshoku Haki. As a side-effect, he is incapable of standing still on the ground, and instead constantly bounds on the spot. This form was created in order to combat the many powerful and large animals on Rusukaina.