Victor Poulin makes and sells his own boomerangs (hey, everyone needs a hobby) and while that might not sound like an entirely booming business, we've a feeling he's onto a winner with this actual returning Batarang that would probably kill you if it got anywhere near your head.
Watch: Man builds actual working Batarang that could probably kill you
search for anything!
e.g. The Penguin
or maybe 'Rebel Ridge'
House of the Dragon
Paul Mescal
search for anything!