Don't know about America, but lots of Australians don't look when they open up that big slab of metal. I've also had to explain the concept of 'blind spots' in

Don't know about America, but lots of Australians don't look when they open up that big slab of metal. I've also had to explain the concept of 'blind spots' in car mirrors to a lot of people - and this is something I was personally tested on for my licence.