in my old old old first car (81 cortina), i pulled across someone in traffic, he clipped my bumper and took off about 30cm of it, no biggie..
But he damaged his headlight, indicator, front bumper, front quarter panel, two rims, and munched two tyres as he skidded and hit the kerb afterwards.....
... got his name and address, but never heard from him again.
$80 later i had a new bumper YAY!