i was listening to NPR yesterday about kids being left in the car and first though, "what the F!". then they went into the details, some guy usually drives kids and wife and drops off kid, then wife, then works. this one time, he had to drop off wife first, and on the way to drop off the kid, someone called about work and he was under stress so he got to work and keep on the phone. an hour after parking he realized the kid's still in the car. the kid lived but had 6 strokes. that's why we have overhead protection. another recommendation during the story was to put your phone or keys, whatever, next to kids when you put them in car. i can definitely see how a little bit of stress and not following same routine can completely derail train of thought for something horrible like this to happen.