Hellcat_240 said: what kind of ninja technique is this?
Ninjas were historically well-known for being resourceful enough to adapt to new technologies like gunpowder and firearms for use in their traps, going as far as setting up functional IEDs to kill their targets.
This appears to be a new technique, "Whip-out-a-minigun-and-shoot-everything-that-moves-no-jutsu".