Hi Ploppyp.... lol brilliant username !
If a car hits you personally, then you'd do better to go to hospital to get yourself checked out for broken bones etc...
However, if you mean, a car hits your car then if the repairs would cost less than the *excess* value then you pay for the repairs... anything over that amount and the insurance company will pay for the whole repair. The big problem is that the repairs quoted to insurance companies by the bigger accident repair companies tend to be seriously inflated amounts and can often be more than the car is worth. In this case, then the insurance company will view the repair as being uneconomical and will write off your car (ie scrap it) and just give you the market value - which might be a lot less than it is really worth to you, especially if you've had the car for a long time and know its history.