
Apparently, Imran was asked to use a fake knife for the shot but the director Sanjay Gadhvi preferred the real thing. And Imran was not at all scared using a real knife since he is quite a pro at it.
The actor had mastered the act of using a real knife during his boarding school days. He said, "I love doing that and if you look at my hand closely, I still have a few scars of the days when I used to do it."
But Minissha was not really keen on getting her hands scarred since the knife was to be jabbed between her fingers after all. Talking about the experience, she said, "I was terrified. We had to use a real knife as it was a close up. Imran had assured me that I was in safe hands since he had done this kind of thing with friends while growing up. I was genuinely on the verge of being knifed during the take and I didn't have to move at all. But true to his word, Imran was a master at this and I got to see another day with all my fingers intact!"
Now that's what we call getting into the skin of a character!
Source : http://www.buzz18.com/news/movies/imran-stabs-minissha/83761/0