Notable appearance: Batman: Under the Red Hood
Although they have never been used in the comics, Batman’s handheld rocket boosters can be seen in the recent animated film Batman: Under the Red Hood. While chasing the deadly Red Hood through an alleyway, Batman reached into his belt and slapped two metal disks on a nearby dumpster.
Suddenly, both disks shot out flames like a jet engine and turned the dumpster into a trash-filled projectile of doom. These handheld rocket boosters give Batman the ability to make any heavy object into a jet-propelled weapon. And in a city that has an estimated two dumpsters for every five people, Batman’s got plenty of ammunition.