A rush of people all needing to get somewhere.
Something is wrong. Blood drips from your head and everything goes silent as if you're in a dream.
The world disintegrates, leaving nothing but you and your dying gasps.
You awaken with a terrible spinning feeling in your head, the smell of burning destroyed sulfur and god knows what else around you.
Metal clangs at your feet, but can't bring yourself to see what it is.
But then, it starts.
The countdown.
You don't know where it came from, what it's for, really, you don't know what the hell is going on.
But you know you have a pistol. 50 bullets, and your brass knuckles.
It's time to exterminate the barrels.
Some wonderfully timed screenshots
Spoiler: