Those who have seen the Rohan Sippy produced Taxi No. 9211 must have been surprised to see the closing credits mention a certain Ms. Piggychops a.k.a Priyanka Chopra. Chopra was re-christened 'Piggychops' by Rohan Sippy and Abhishek Bachchan during the shooting of Bluffmaster. The actress has made a special appearance in Taxi No. 9211 just towards the climax. Apart from working with Sippy in Bluffmaster, she has also worked with John in Harry Baweja's Karam. And when it was a film involving Rohan and John, she absolutely could not refuse a cameo! All in the name of friendship!