[eminence32]

I remember vividly a childhood experience when a car I was in ran over a dog -- it ran towards the side of the car and went under the rear wheels of the car. I'm not sure there's any reaction time (human or otherwise) that would have prevented that from happening.

[nomel]

I almost hit an inebriated homeless person when they fell out of a bush into the road. There are scenarios where the only "safe" speed is 0 mph.

[potato3732842]

I saw a duck kill itself by flying head first into a parked truck at maximum speed while being chased by some other bird.

So ever 0 isn't "safe", lol