Sidharth Gupta, who makes his acting debut with Kuku Mathur Ki Jhand Ho Gayi, and Varun Dhawan, were in for a shock recently, when a prank they played on Nargis Fakhri went awfully wrong and she fainted. The `jhand' was planned as part of a reality show. The two actors decided to up the fear quotient to ensure that they succeeded in scaring Nargis. When the actress stepped out of the elevator, there was this man waiting, pointing a gun at her. Obviously, she freaked out. “Nargis screamed aloud and was so scared that she fainted,“ recalls a source. “She was inconsolable and it took a while for the guys to pacify her,“ the source adds.