Write a sloppily written note that says something to effect of: "ooops! Sorry about the damage to your vehicle...I was reading a text & wasn't paying attention! Give me a call I will gladly take care of the damages....sorry!" Do not include a phone number, unless it's your own and you want to say "punked!" when you receive their call. Then place the note under the windshield of your victim's vehicle, and if possible, watch them as they return to the car & read the note...then watch them walk around and around their car looking for "damages" that don't exist.