Take the bitch by the hair and drag her towards front bumper. Strap her ass to the front bumper. Start to drive away from scene of accident. Locate solid brick/concrete wall. Crash into said wall doing ~10 MPH. At such a rate of speed it would be enough to splatter her to a mere flapjack yet should cause no damage to the front fender. Only problem now is cleaning off that bloody mess which is a small price to pay for the joys of simulating a terminator movie.
"Anyone can make Anyone cry...................... But it takes a Genius to make someone laugh." -Charlie Chaplin-