Which early comedic actor lost the thumb and index finger of his right hand when he mistook a bomb for a prop?

Harold Clayton Lloyd, Sr. (April 20, 1893 – March 8, 1971) was an American actor, comedian, film director, film producer, screenwriter, and stunt performer who is most famous for his silent comedy films.

Harold Lloyd ranks alongside Charlie Chaplin and Buster Keaton as one of the most popular and influential film comedians of the silent film era. Lloyd made nearly 200 comedy films, both silent and "talkies", between 1914 and 1947. He is best known for his bespectacled "Glasses" character, a resourceful, success-seeking go-getter who was perfectly in tune with 1920s-era United States.

Lloyd's career was not all laughs, however. In August 1919, while posing for some promotional still photographs in the Los Angeles Witzel Photography Studio, he was seriously injured holding a prop bomb thought merely to be a smoke pot. It exploded and mangled his hand, causing him to lose a thumb and forefinger. The blast was severe enough that the cameraman and prop director nearby were also seriously injured. Lloyd was in the act of lighting a cigarette from the fuse of the bomb when it exploded, also badly burning his face and chest and injuring his eye. Despite the proximity of the blast to his face, he retained his sight.