- In the 1950s he penned several Western dime novels, published under the pseudonym Jack Mills.
- Was fluent in German.
- In the original versions of his movies, even in the ones directed by himself, his voice was almost always dubbed by professional Spanish dubbing actors, most frequently José Guardiola or Simón Ramírez. A rare instance in which he used his own voice occurred in The Night of the Executioner (1992).
- Father of Sergio Molina.
- Was at one time a professional wrestler.
- His barrel-chested physique was a result of his early career as a weightlifter..
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