What is consciousness, really? Can we - as some have suggested - create our own reality? And what is "reality", anyway? This is a "Flash Fiction" piece (a story in less than 1000 words) about one man's strange encounter with an enigmatic younger man in a quiet neighborhood park. In the end, a little girl gets a grown-up lesson on what's real and what isn't. To paraphrase the great Rod Serling: "You're moving into a dimension of both shadow and substance, of things and ideas. You're about to cross over THE FINE LINE into... the Twilight Zone.