Originally Posted by mgkdragn
I don't think the heli had anything to do with the herd .. the "migration" comment in the finale is likely the cause ..
Yeah, it did. They showed the zombies look up at the helicopter and then start walking the same direction it went. They have already established that noise directs them, they just kept walking in the same direction.
Plus, I thought it was cool is that it looked like the horde was going to walk completely past the farm, but when Shane fired his last shot, the horde turned and walked towards the sound, which was also toward the farm.