Taking a film, which demanded the last four years of your life, to the audiences can be satisfying as well as nerve-wracking. For Nag Ashwin, it’s exhilarating. His sci-fi actioner, Kalki 2898 AD, made over Rs 400 crore in the domestic market within a week of its release. “It’s satisfying to see people enjoy and write congratulatory messages that usually start with ‘Thank you for making this film,’” he grins.