According to the patent, "Typically, vehicle drivers and/or passengers place objects on, for example, the roof or hood of their vehicle. Often, the driver and/or passengers forget that they have placed the objects there, and proceed to enter the car and drive away. The objects are usually grocery or food items, or beverages such as coffee or soft drinks, etc., but may include other items. Indeed, in one reported case, a baby was placed on the top of a vehicle and the vehicle driver drove away without knowing the baby was on the roof of the vehicle. The results of this sequence of events range from the comic to the tragic."