Japan's Marudai has brought forth upon this world a new form of water gun: a water rocket-propelled grenade launcher, which fires water
balloons bottle rockets a great distance. As the machine-translated text says, "This toy is a toy and enjoy the recoil when firing injection.
Please observe the rules and manners play within the terms stipulated." Can't argue with that.
(Thanks, Fipi Lele!)
More at Boing Boing