Urmila's character doesn't have a name.In the whole film she is referred as Mam.
Film was shot in 15 days.
Manoj Bajpai's role was originally suppose to be a serious character which was mysterious with out any humor. One the first day of the shoot, Manoj suggested they change the character and make him more goofy and fun. Ram Gopal Verma agreed with Manoj and changed the character on the sets.
There are only three characters in the whole film.Urmila,Manoj Bajpai and Sushant Singh.
Anurag Kashyap stated he was not happy with the screenplay he wrote and was over it 2 days after the film released.