Rituraj, Hope you are not hurt with the slip. It might cost him 3-3.5k. I had such incident. The guy parked his new Swift just a foot behind my car and there was one more car of my neighbor parked in front of mine. The guy parked behind was seeing me taking reverse but didn't give enough space. The bumper hit his and his front bumper had scratches. We took his car to nearby Maruti showroom and they told it may cost him around 3700 overall. I paid him 3000 as he was reluctant to go with insurance and I was supposed to go hospital. I simply cursed that guy that he also will have my such situation with at least a guy who owns a Mercs/BMW/Jaguar.