During the summertime, it could be said that the hottest moment between is when you first get into your vehicle. This is the moment that really sets the mood for the trip. I don't know about you, but I don't like to drive grumpy. It opens the door for road rage, of which we already have plenty on our highways.
Cooling down your vehicle quickly before you set off on your journey will reduce your agitation level, heighten your awareness, and enable your vehicle's air conditioning to work less, thus saving gas and CO2 emissions. While this quick cool down method is not exactly nuclear physics, it is a bit of a lesson in applied sciences.