Actually, that'* a good reason to own a Smart car. The passenger compartment stayed reasonably intact during the crash. If anything, this video is a good reason to not be a human... we're too squishy and, as the narrator said, we can't safely handle that rapid deceleration.
However, if I had to crash into a concrete wall at 70 mph, I'd rather do it in a Bonneville, an SUV, a van, or maybe a tank. Something with a little more buffer room between me and the wall.