I'll add my half token's worth on the helicopter thing. If the intent was to herd them in a certain direction, the chopper would have been flying much lower and slower. At that height and speed, walkers are barely indistinguishable dots. I think the main purpose for them showing the chopper was to instill into viewer's and any survivor's minds that there is at least some hope of a safe zone or normality. That's how I viewed it anyway. :dontknow: