They remain cool. We expect our action heroes not only to be good shots but stand-up comics as well. Yet few examples of Hollywood violence are so slapstick. Often, what we're given is realistic violence combined with unrealistic emotional reactions. There's a moment in the film in which Julia Roberts' character loses someone to her that is near and dear.
Death becomes something as disposable as the remains of a drive-through dinner.
But the overwrought, implausible style in which the film's violence is presented is itself comical. People die, but their ends are little more than comic-book exits. Along the way, it becomes ever easier to detach ourselves from death. Perhaps not from seeing one violent film, or a dozen. But again, that film's appeal lies in its very silliness.