Better start keeping an eye on Jack's sweater, by the way, Sinclair. There are already pink spots of blood and water soaking into it. And it's only going downhill from here.

"Okay," he says. "I remember a lot of... machines down there." Don't ask him what they did, though -- unless it involves hacking, he's less of a mechanic than he is a fireman.

Jack grabs the chemical thrower, starts leading the way back out into the glass tunnels.