You are in the midst of some kind of military-esque training exercise. A dark house with many rooms. Close-quarters urban combat and all that. Only not really military? You’re wearing civilian clothes; clandestine operations? CIA? some other secret agency? The pistol is real enough, but it’s loaded with sugar cubes. They sting like hell when you get hit with one. But so far you’ve only taken one shot to the shoulder. You seem to be doing well enough though. You’ve landed several shots on your opponents (also stumbling around in the dark). But who knows how much longer you’ll last. You’re low on ammo (sugar cubes), and you’ve bunkered in a small-ish room at the end of the hall, and you can hear them coming.