Mafia City is a mobile strategy game by Yotta Games that became widely known through its viral level comparison adverts in 2018 and 2019. Short effects from those adverts were clipped and shared on soundboards and in meme edits, and the doik spread as a standalone bonk sound. It sits alongside other cartoon hits like the Doge bonk, used whenever a creator needs a fast, silly impact without dialogue or music to explain the joke to the audience watching online.