Even though she may not be seen much at public events or come out during the day, Rani Mukerji went night patrolling with Mumbai cops recently. As part of the promotions for her upcoming film ‘Mardaani 2’ and to understand the cops better, Rani hopped in the police car with the lady patrol team to boost their morale. Production house Yash Raj Films released the ‘Mardaani 2’ trailer in mid-November which was received well by most. The sequel shows Rani in a fearless cop avatar. Directed by Gopi Puthran and made on an impressive Rs 40 crore budget, ‘Mardaani 2’ is set to hit theaters on December 13.