[Walking along a crowded sidewalk]

You know, I got to thinking. With you here and seemingly occupied, how's your work going, I mean, elsewhere?

While you were shaving this morning, you weren't just shaving.

What do you mean?

You were hatching ideas, making plans, arriving at decisions, right?

Yeah, I guess so

So you get the concept. While part of you is doing one thing, another part of you is doing another, perhaps even attending to the problems of your work. Correct?

Of course

So you understand the idea. Congratulations, Bill. Now multiply that by infinity, take that to the depth of forever, and you still will barely have a glimpse of what I'm talking about. [Bill stops, Joe keeps walking, Bill takes Joes arm and stops him from getting hit by a car...again]