Mine is very much like dreaming...ever see Scrubs? I'm not as narcissistic as J.D., but I do often have flashes of how I imagine something might play out in my head, as if I suddenly transport to a reality inside myself and experience it. (that sounds like such babble, I wish I could explain it better!) My actual dream life, btw, is very hyperactive. I often wake up feeling emotionally exhausted.
Other times, it's an almost physical feeling of unexplained excitement or knots in my gut, when I know something will play out poorly. Often, for me, that initial "kick in the stomach" reaction is like the knock on the door that signals an inward retreat to view how something might happen. First, visceral reaction, then, inward movie theater-like exploration.
This, combined with my big F often are responsible for my tenancy to get behind the eyes of others, and I guess I mean that in a very literal sense. I find it easy to guess, from their vantage point, how life might next play out for them, as well.