The Undercover Martyn Breast Slap meme originates from the 2010 music video for the hit indie track Undercover Martyn by Two Door Cinema Club. In the surreal video, lead singer Alex Trimble is subjected to various physical oddities, including a memorable moment where he is slapped firmly on the chest. The scene gained traction as a meme due to the unexpected nature of the strike and Trimble's shocked expression. It is commonly used to symbolize a person being hit by a sudden realization, an unavoidable responsibility, or a surprising plot twist. The rhythmic and visual timing of the slap makes it a versatile template for highlighting the contrast between a peaceful state and a sudden, jarring disruption.