Emraan and Vidya are going to promote their upcoming flick, Ghanchakkar in the local trains of Mumbai, Delhi, Indore and Lucknow, according to a source. Seeing that the local trains play an important part in the film, the strategy of endorsing their film in the trains may turn out to be a good idea. Rajkumar Gupta directed Ghanchakkar’s promos have been released digitally and have received a positive response from the audience. The movie is set to hit the 70mm on June 21 this year.