While director Rajkumar Santoshi and the unit were sure that Ranbir would be able to climb the rope ladder swiftly, they were apprehensive about Katrina and wondered if she would complete the shot successfully. But something opposite happened much to the unit's surprise. "Katrina climbed the ladder swiftly, while Ranbir was way behind. When he looked up, he was stunned to see Katrina, comfortably perched on the top. The entire unit stared at Katrina's act with amazement," said our source.
Ever since that day Ranbir calls Katrina Rambo's sister Sambo!