I nearly got run over by a Prius a few years back. A guy came to our house to give a quote for some work. As he walk back to his car I spotted some weeds in the slabs on our drive so I wandered up to pull them out.
I'm on my hands & knees, so when he reversed into our drive to turn through 180 he couldn't see me. Because it was a Prius on battery I couldn't hear him.
First I'm aware of it is when I see a bumper about 6" from my head, out of the corner of my eye. Luckily I was able to roll sideways before it hit me.
As for lekky cars sneaking up on you, with the youngsters around here, their car sound systems are so loud you hear that coming long before you hear the petrol engine.