ThinkGeek, fine purveyor of nerdy things ranging from U.S.S. Enterprise pizza cutters to TARDIS mini fridges, has introduced an exciting new product: A letter opener constructed to be an exact replica of the Batarangs from the Batman: Arkham Knight game, with metal, pointy edges and all.

And, since the people at ThinkGeek are not idiots, they mention several times over the course of the product description that it is indeed a letter opener and not a thing that you’re supposed to throw at people. Come on, though, you know it’ll happen, so let’s sit back and count how many Batarang-related E.R. visits are racked up in the next year. This Christmas, “You’ll shoot your eye out” will morph into “You’ll embed that stupid thing in your little brother’s forehead.”