if your type of footwear is well insulated then chances are you will get a shock after rubbing your hairy back on the seat for awhile then steeping out all charged up, the first thing you touch will act as a earth, if its the car then its the car... when you are wearing what ever you were at the time you got shocked, drive and park up next to your mate, get out of the car but dont touch the car once you have gotten out of it..dont close your door, then touch you mate on the ear and watch him jump