On a documentary, Alfredo Landa told that director Luis García Berlanga was such a perfectionist that he usually made the performers repeat the same shot until it was OK. So happened with the scene in which Landa has to run to the top of a hill to get the sound man: he had to repeat it 41 times.
La clave de todo es este chico, Mariano se llama.
Teniente Broseta: Mucho pelo, eh, mucho pelo.
Brigada Castro: Se le corta.