He even dressed in the garb of his character, Jogi Parmar, from the film.
Emraan said it had not been his intention to come in an auto, but since it was the flavour of the character he decided to surprise the audience.
"There's a sequence in the film with an autorickshaw. So we decided to lend some authenticity to the music launch, too," said the actor.
Later, giving the crowd a stained, yellow-toothed grin, Emraan thanked them.
Director Dibakar Banerjee and music directors Vishal and Shekhar were also present at the event.
Text and images: Sify.com