In an interview with Extreme MMA News, Matt Brown describes his feelings before a fight akin to scenes the movie 300:
Explain the feeling you get when walking out to the cage and the moment the door shuts behind you.
It was described perfectly in the movie 300 in the wolf scene and again at the ending. “It’s not fear that grips him, but restlessness. A heightened sense of things.” I can’t describe it any better.