Maybe my imagination is running too wild. The scenarios I have thought about so far include:

1. The gang controlling the must-pass intersection behind the barricade of burned out cars, with evidence that the fate of passersby is none too pretty.

2. The government blockade to enforce no-travel restrictions that would force me to remain in an untenable urban environment with exhausted resources and constantly increasing threat of attack.

3. The dog pack, human predators, rising flood waters, or increasing flames on my heels when I encounter the unclimable chain link fence topped by razor wire at the end of a dead end alley, or otherwise preventing my escape.

4.The unclimable chain link fence topped by razor wire that would force me to travel beyond my likely resources to avoid encountering any of the above.