Klaus Kinski was a German actor famous for an intense screen presence and a famously volatile temper, and short clips of his outbursts have long circulated as reactions in German-language internet culture. 'Was soll das?' is a common German expression of disbelief, and in Kinski's delivery it sounds less like a polite question than a furious challenge. Shared through soundboards, videos and streams, the line is now used far beyond its original context, giving creators a ready-made way to express exasperation at something nonsensical, without needing a translation for the feeling to land.