partially my fault but more the other persons, i had my signal on to parallel park in a spot and put my car into reverse there was a lady behind me in my blind spot who SHOULD have beeped once i started going in reverse however didnt, resulted in a minorly banged up bumper and a dented exhaust tip, how much to fix approx? we didnt exchange insurance info and all she was just like its fine i was pushing to exchange it but she didnt feel we had to so i let it go because i dont want higher insurance.