I know you meant this as a joke.. however, Volvo cars do watch for pedestrians and automatically stop for them if needs be. In the worst case, there is an external airbag that will deploy in front of the windshield to avoid the worst types of injuries based on decades of analysis of car accidents with pedestrians (in Sweden).

Except when they don't, as demonstrated in the rather famous fail below during a PR demo:

https://www.youtube.com/watch?v=lcJ9xgBZJdI

The explanation was "The failure of the test was due to the dummy not being set up properly", which I find rather less than reassuring.

http://www.drive.com.au/motor-news/volvo-crash-test-goes-wro...

That's like Gate's BSOD during the demo of PnP. Works now, doesn't it? ;)

On the 'up side'; if the pedestrian safety air bag fails, it'll be just like any other car.