India, Nov. 28 -- Remember the beach sequence - featuring Hrithik Roshan and Katrina Kaif - from Bang Bang (2014) wherein they are ensconced in a beach house, but still get attacked, leading to an elaborate action sequence? Until that point, director Siddharth Anand hadn't shot "any action scenes in his life". "I had done only romantic films that didn't even feature a slap. So, I didn't even know how to shoot a slap," he says with a laugh....