what is the best practical joe you played that backfired hilariously?

I always say outlandish things to mah girl, to scare her. Like guess what I got fired from my job... wait! just kidding! But this one day it backfired. She was on the phone talking to a friend in a different room, and we heard a loud sound from outside. Out of no where I decide to say: Someone hit your car! She says: Really? I say.. nah.. but to find out what it really was, I look outside. And guess what? Some fool crashed into her car, while it was parked. So I say babe really someone crashed into your car! Hurry come see! She then tells me to shut up, that shes on the phone, doing something important. I run to her with a serious face and say: Look at me, Im serious.. someone just crashed your vehicle. She then runs to the window, and sees a big orange mark all across her green vehicle, and the rear view mirror on the out side was hanging on its hinges. The dent was hard to notice, but we ran outside and saw that a nice hit was delivered... It was rather frustration.. I mean.. how the heck do you hit a parked car? Im guessing the dude was drunk or a new driver.. because before the hit, there a continued sound of forward brake, forward brake, forward crash....