I think most of the answers fail to take this situation seriously enough. This happened to me. I've been to gyms only a few times in my adult life. Farm work is more than enough, but my girlfriend, who teaches at a women's college, wanted me to go to the swimming pool with her. I was eager thinking a swimming pool at a women's college was going to be like the Muslin heaven with forty virgins in paradise. My girlfriend, being a medieval scholar, said not to get my hopes up. The forty virgins thing was likely a corruption of the original text which more properly translated as forty grapes.
Anyway, after the swim I entered the darkened men's locker room. Being a women's college, the men's locker room was empty. As I opened the door, and started walking down the hallway at a fast pace, I saw this man coming dead at me at an equal pace. Of course in violation to the school's rules I had a large knife easily accessible, but this character closing in on me fast was nobody I wanted to meet in a dark lonely hall. Even in the almost darkness warning bells sounded in my head. I didn't like the way he moved or carried himself, or especially the way he closed on me fast. My advantage of the knife seemed very small. I back pedaled fast toward the hall door and hit the light. That's when I saw my own reflection in the full length hall mirror.
