As a person, Kubrick was described by Norman Lloyd as "a very dark, sort of a glowering type who was very serious". Marisa Berenson, who starred in "Barry Lyndon", fondly recalled: "There was great tenderness in him and he was passionate about his work. What was striking was his enormous intelligence, but he also had a great sense of humor. He was a very shy person and self-protective, but he was filled with the thing that drove him twenty-four hours of the day." Kubrick was particularly fond of machines and technical equipment, to the point that his wife Christiane once stated that "Stanley would be happy with eight tape recorders and one pair of pants". Kubrick had obtained a pilot's license in August 1947; some have claimed that he later developed a fear of flying, stemming from an incident in the early 1950s when a colleague had been killed in a plane crash. Kubrick had been sent the charred remains of his camera and notebooks which, according to Duncan, traumatized him for life. Kubrick also had a strong mistrust of doctors and medicine, especially those he did not know, and on one occasion he had a dentist from the Bronx flown to London to treat him.