On the sets of Rockstar, director Imtiaz Ali wanted to shoot a sequence involving Nargis Fakhri riding a bike with Ranbir Kapoor sitting pillion. The catch was Nargis had never ridden a bike. Of course, Ranbir was frightened. But apparently, Nargis had taken lessons from the crew half an hour prior to the shoot and she turned out to be a quick learner. At the end of the sequence, Ranbir was safe and sound. :) Would you ride pillion with a newbie? I have to admit, I would have my reservations.