Mr Bean is Rowan Atkinson's almost silent British comedy character from the television series of the same name, which first aired in 1990 and became famous around the world for physical comedy and exaggerated facial expressions. The shouted no fits that style perfectly, turning a simple refusal into a full-body panic. As short clips from the show were shared on soundboards and social media, this reaction became a handy shorthand for disbelief and refusal, and it remains popular because almost everyone recognises Bean instantly, even without any dialogue or context.