The line comes from Les Luthiers, the Argentine comedy-musical group, and is performed by Marcos Mundstock in El regreso del indio, part of their show Unen canto con humor from 1999. In the sketch, Mundstock plays with the similar sounds of Lenin and McCartney, turning a historical name and a Beatle into a verbal joke that only clicks after a moment of thought. Shared as a short audio clip, it has found a second life among Spanish-speaking comedy fans who reuse the laugh and the sudden understanding as shorthand for finally getting a joke.