The craziness should be there from the start! I'm not necessarilly referring to difficulty, just...action. Walls should be exploding, lights should be on the fritz, helpless people should be running around screaming. I don't know, it's just so sterile, like you said, it's a public toilet. I wouldn't be as demanding if I had control over the movement, because then there's a layer of exploration and strategy on top of the shooting, but since it's scripted, something more interesting should be happening.