I come from.....

I come from behind working my way to the front. Eager to move forward silently, without notice. My method is calculating, my momentum builds up gradually. The sound of my breathing barely audible at first, then appearing along with the sensation of my hot, moist breath. You are afraid to turn around. Afraid of what may be behind you, afraid of how close I may be to you, afraid of losing your own momentum. I envision overtaking you, not by much, but just enough to cross the line resulting in a photo finish.