My gas saving idea. The drive thru conveyor belt or something similar. Basically you pull up to the drive thru at your favorite fast food restaurant, dry cleaner, etc., and simply put you car in park (or possibly neutral if setup similar to a car wash). You can turn your car off and some other mechanism (conveyor, etc.) would move you on around to the window for your order. Thus not having to sit in line inching forward and burning gas.