You were following the train tracks after your previous base was flooded. You have a backpack on you, and a pistol, although it has no ammo. You come upon one of many abandoned trains, a common symbol of the initial anarchy of the infection. You hear mumbling up ahead, and you see a campfire in a old boxcar. Poachers, you listen in, and hear one start to speak.

"Seriously, I don't get why they run so often, are they stupid?"

They're most likely talking about the hybrids, stay low.