Who is credited with launching the "Spaghetti Western" film genre, John Woo, or Sergio Leone?
John Woo:  He is considered a major influence on the action genre, known for his highly chaotic action sequences, Mexican standoffs, and frequent use of slow motion. Sergio Leone: Sergio Leone (] ; 3 January 1929 – 30 April 1989) was an Italian film director, producer and screenwriter, credited as the inventor of the "Spaghetti Western" genre.
Sergio Leone