Pranksters in Basel, Switzerland, decided to go after the game players as the city hoped to use the game’s popularity to attract tourists.

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THE REVENGE Pokémon Go

A prank video shared to YouTube by fadeoutTrashTV showed the group dressed in Pokemon-themed unitards “taking revenge” on citizens for playing the smartphone game Pokemon Go by bombarding them with human-sized pokeballs.

The group used a large slingshot to launch the giant inflatable balls at unsuspecting bystanders, often seen carrying their phones.