The creepiest quote I've read in the comics so far- issue 27, coming from Michonne:
"That's just how it works out in the open. We're passing them, walking right by them without noticing- but they're noticing- and following. They can't walk as fast as us, so the longer we walk, the further away they'll be...but they're still after us. When we get to wherever it is we're going, when we stop it's just a matter of time before they catch up to us. And the longer our trip...the more there will be."