Why Deepika Padukone Smashed A Bottle Against Her Director's Head?

On her last day of shoot for the film Chennai Express, Deepika Padukone entered into an action zone. First she indulged in a (fake) fight with her co-star, Shah Rukh Khan and then smashed a bottle over Rohit Shetty's head. Well, we know Rohit and his tricks. He has weird ways of promoting his film. This behind-the-scenes video was posted just a month before the release of the film in 2013. This hints that all this drama was created for some buzz. Now, we don't know if all this worked as he expected. However, we can even see Rohit smiling after getting hurt by the (fake) bottle. Filmmakers love creating such scenes for attention. Have a look: