A few weeks before I sold my old car, I was waiting at traffic lights on the highway (about 60km from my home town), when a guy crashed into the back of me.
Like you once I open the dickey I could not close it bumper was totally gone and dickey door damaged.
The guy comes out and abuses me for stopping, I told him the light was red, other people joined in and said it was his fault, he refused and I left without a penny.
My reasons were I was selling the car in two weeks, if I filed a FIR the car might be tied up and I would not be able to sell it. Also as I was away from home I thought any case would be in the local courts (not in my home town) and the time and money it would take to chase it up would be more.
Luckily I got it fixed to be in a saleable condition for Rs6000. Okay I lost 6k but I don't think the guy would have paid.