Is there a way to make the camera shake when someone fires at you or when you fire in a closed area that your camera is zoomed in?

Camera shake is a property of explosions, rumble effect objects, and (according to psych0fred's site) droideka deaths. As such I think the only way to even partially achieve this really cool idea you have would be to give all your weapon ordnances an explosion that has a shake property. The shake would only happen if/when the ordnance impacts something though.