[formerly_proven]

You go 30 km/h. A kid runs on the street. You manage to stop just in front of it.

You go 40 km/h. The same kid runs on the same street. You brake the exact same way. You hit the kid with over 30 km/h. You just killed a kid.

[bluescrn]

Kids don't run out into the street chasing stray footballs anymore. They're all indoors staring at screens.