[ He's slumped over on the floor, specs of blood here and there from his injuries as he regarded Majima lethargically. ]

Noticed that nothing bad is happening here? You'd think that with the blood rains coming down, this place would turn into a second bomb of shit. But no. No it's not.

[ He nods to the door several feet from where he sits, the signs of an explosion around the lock are still there, along with signs of juvenile vandalisim. ]

I suspect the reason is behind that. There's some kind of machine I suspect, you can hear the whirr if you put your ear on it.