*bilingual French/English* The crazy story of the mythical avant-garde rock band Etron Fou Leloublan (1976-1985), pioneers of the European Rock in Opposition movement. "My whole life has been built on a childish lie. It's strange for me to think back on it now, looking at it from this angle, more than 50 years later. I'm 12 years old... I fall in love with a girl in my class, whose name I will not mention. And to shine in her eyes, I invented a story and told her that I was a drummer in a rock band. It was the end of 1967...". Drummer of the cult French band Etron Fou Leloublan and co-founder (with Henry Cow, Univers Zéro, Art Zoyd, Stormy Six and Zamla Mammaz Manna) of the Rock In Opposition network, Guigou Chenevier has never ceased to multiply his musical experiences in an unclassifiable and innovative rock spirit from which (listening to his projects such as Les Mutants Maha, Rêve Général or La Mâchoire et le Couteau) he has still not abandoned.