In the 1966 Toei fantasy flick The Magic Serpent, the hero Ikazuchi-Maru is ambushed by a gang of boomerang-wielding ninjas (who are way more dangerous than hula-hoop-wielding ninjas).
https://gizmodo.com/hula-hoops-and-fish-grenades-two-contenders-for-the-wo-5810125
The dastards succeed in decapitating our hero, but he’s got one last stupid ninjutsu up his sleeve. Also, witness the most ignominious death of a ninja henchman ever committed to celluloid.
This clip comes courtesy of Sardonicus1313’s YouTube channel, which is chock full o’ ninjutsu and kung fu weirdness, namely “The Vagina Bubble From Hell.”
https://gizmodo.com/q-whats-the-worst-ninja-magic-ever-a-the-evil-vagin-5642030
