Walduś, full name Waldemar Kiepski, is played by Bartosz Żukowski in Świat według Kiepskich, the long-running Polish sitcom that began on Polsat in 1999. The character became famous for his simple thinking, catchphrases and this distinctive laugh, which Polish viewers instantly associate with him. Clips of the show have circulated for years in meme edits, compilations and reaction videos online, and this short laugh was isolated as a standalone sound for joking about silly ideas, mistakes and clueless reactions.