Bachchan's character was originally intended to have been killed off; but, after the change of script, the character lived in the end. Desai felt it would have been inappropriate for the man who had just fended off death in real life to be killed on screen. The footage of the fight scene is frozen at the critical moment, and a caption appears onscreen marking it as the instant of the actor's injury. The film was released in 1983, and partly due to the huge publicity of Bachchan's accident, the film was a box office success and the top-grossing film of that year. Health Issues Later, he was diagnosed with Myasthenia gravis. His illness made him feel weak both mentally and physically and he decided to quit films and venture into politics. At this time he became pessimistic, expressing concern with how a new film would be received, and stating before every release, "Yeh film to flop hogi!" ("This film will flop"). Career fluctuations and sabbatical (1988–1992) After a three-year stint in politics from 1984 to 1987, Bachchan returned to films in 1988, playing the title role in Shahenshah, which was a box office success. After the success of his comeback film however, his star power began to wane as all of his subsequent films like Jaadugar, Toofan and Main Azaad Hoon (all released in 1989) failed at the box office. He gained success during this period with the crime drama Aaj Ka Arjun (1990) and action crime drama Hum (1991), for which he won his third Filmfare Best Actor Award, but this momentum was short-lived and his string of box office failures continued. Notably, despite the lack of hits, it was during this era that Bachchan won his first National Film Award for Best Actor for his performance as a Mafia don in the 1990 cult film Agneepath. These years would see his last on-screen appearances for some time. After the release of the critically acclaimed epic Khuda Gawah in 1992, Bachchan went into semi-retirement for five years. With the exception of the delayed release of Insaniyat (1994), which was also a box office failure, Bachchan did not appear in any new releases for five years. Business ventures and acting comeback (1996–1999) Bachchan turned producer during his temporary retirement period, setting up Amitabh Bachchan Corporation, Ltd. (ABCL) in 1996. ABCL's strategy was to introduce products and services covering an entire