After the debacle of Humshakals, actor Saif Ali Khan seems to have traded slapstick comedies for dark humour. He will soon be seen as the lead in Mr Chaalu produced by Farhan Akhtar and Ritesh Sidhwani. In the film, directed by Rima Kagti, Saif will play a dapper though manipulative womanizer. The film will be shot across Goa and Mumbai.