Zombie Apocalypse.

Solemnly, you leave the small group. They understand you, but they're ashamed of you at the same time. They feel betrayed, but they make no effort to stop you on your journey. It's every man for himself at this point.

As day five comes to a close, day six begins to emerge, and the sun begins to rise. Off in the distance, you can faintly make out what looks like an airport terminal. If you run, you will make it.