Nandana Sen, who learnt martial arts for a film with Viveik Oberoi, says the training made her less vulnerable as a person.

"I play an undercover cop in the film and the role required me to learn martial arts. I learnt to use a real gun too," said Nandana.

"Earlier, I used to fear being in crowded places. My stunt scenes have helped me overcome that fear. The combat training really helped me come out of my shell and feel less vulnerable in crowds," she added.

The film, which is being produced by Tips and directed by Kukkee Gulati, is different from Nandana's forthcoming release "Rang Rasiya".