India, Dec. 8 -- How a film fares at the box office often decides the fate of the actors who are part of it. Critical appreciation is essential but, at the end of day, one needs to prove his/her worth in the show business, feels actor Ali Fazal. So when his films don't work, it does give him sleepless nights, and even after having spent more than a decade in the industry, he still hasn't got used to it....