The whirring noise of the rotating blades mingles with beeping as the manhacks advance- and then with the sound of metal smashing against metal, and a sudden shift to an almost agonized higher-pitched noise as Dinah lays waste to the first wave. The luckier machines are the ones that shatter on impact. Others don't receive quite as much force; their lights switch from red to orange as their internal systems rearrange to compensate for now-useless circuit paths. It won't help, of course. Any manhack that comes anywhere near Dinah is in for a very bad, very short day.

Of course, the fact that they keep coming is an issue. The Combine likes to flood tunnels and abandoned pipes with these things just in case refugees try to escape City 17, after all.