1. I can tell who it is by the way they walk up stairs if I've heard it a couple of times. Silhouettes are hit or miss.
2. If someone has gone behind me I unconsciously keep track of where they are. I keep track of shadows and movement easily.
3. I haven't tried driving yet, but I'm really good at bumper cars, if that counts. I also have a faster reaction time while biking than some friends.

Also, what @Beautiful sky describes about the SEE bumping/touching people to have them make way, that's something I do as well. It comes naturally to reach out and gently nudge them by the arm or shoulder one way or another.