We like it when things fall down. Or get blown up, and then fall down. Or get shot, blown up, spun through the air, then fall down upon a pile of boxes that proceed to break into pieces. In slow-motion. While on fire.
Well, maybe not while on fire. Really, we just like to see the reaction to our actions. When you fire a bullet, it should matter. When you fire a bazooka, it should matter more. Brothers in Arms understands this.