I hear stories at work all the time from truckers... naturally, they see things like this often as they're always out there. The funniest story I heard was from a driver who was in stop-and-go traffic in Denver and happened to look down at the car to the left of him. It was a BMW with heavily tinted windows all rolled up, but the woman inside had the sunroof open and was going to town with a dildo. She happened to glance up and saw the driver watching, stopped as she was startled but then smiled and continued going at it... unfortunately I have yet to see anything similar. =p