Screaming and panic

You are shaken awake by sounds of screaming and loud bangs. Still waking up, and very groggy, you're initially confused about where you are and why you're sleeping on the floor, though things quickly click into place.

In the tunnel, a line of ZERO soldiers in riot gear are forming a shield phalanx, holding back a tidal wave of infected. Pandemonium has seized the entire station, with people praying in the middle of the platform, running up the stairs to get out of the station, and desperately trying to force their way into the walled camp. Heavy machine guns set up behind the front line blast terrifyingly loud shots into the zombie horde, but it does little more than slow them down. Any zombies that fall just get right back up, regenerating the massive holes in their flesh.

Yep, it really seems like you're fucked.