Although production was shut down for a time after Errol Flynn suffered a mild heart attack, he came back and finished the picture.
During the filming of Gentleman Jim (1942), Errol Flynn suffered a mild heart attack. His weak heart kept him from serving in the Armed Forces during World War II.
Former Junior Welterweight champion Mushy Callahan not only trained Flynn for the film's fight sequences, his feet doubled for the actor in the shots that showed off his famous footwork.
Soon after completing "Gentleman Jim," Flynn became embroiled in an infamous rape trial. During screenings of "Gentleman Jim," his closing line of "I'm no gentleman" was met with laughter and derision. The line was cut from the conclusion of the 1944 radio broadcast.