Mathieu Sommet is the creator of the legendary French YouTube series 'Salut les Geeks' (SLG), which debuted in 2011 and focused on analyzing viral videos. The show featured Mathieu playing multiple distinct personas, such as the cynical Goth, the naive Hippie, and the authoritative Boss, each with their own comedic style. Because of his highly expressive acting and the distinct visual identity of his characters, screenshots from his videos became staple reaction memes within the French internet community. Even after the show ended, his face remains synonymous with early French YouTube culture, used to express everything from shock to satirical intellectualism.