Yu Yu Hakusho
Facing Kurama in the Dark Tournament, Ura Urashima
uses a fishing pole as a weapon, the string acts as a whip. To get Kurama to
lower his guard, Ura pretends he is being manipulated by his teammates into
fighting for his ill grandmother. When Kurama does let his guard down, Ura
unleashes the Idunn Box, which causes anyone who inhales its mist to revert to
their infancy. However, Ura doesn't understand the true nature of Kurama and
gets more than he bargained for.