Andrea realizes a minute too late that the zombies are strolling on by her and tries to hide, while Lori has to cover Carol's mouth to keep her from screaming for her daughter who is tucked under a car two vehicles away. T-Dog doesn't need anyone to cover his mouth, even though he rips his arm to shreds on a jagged piece of metal, which looks insanely painful. A Walker heads into the RV and starts looking around for Andrea, who is hiding in the bathroom. Now how did that Walker know to go in the RV if he didn't somehow sense or smell her? None of the other Walkers pay any mind to the vehicles. This Walker's rotting face is pretty spectacular. He seems to wander off, until Andrea makes some noise. And then he heads back towards her. T-Dog is bleeding profusely and trying to find a hiding spot. Dale, who is up above Andrea on the roof of his RV, tosses her a screwdriver. T-Dog is nearly zombie bait, when Darryl creeps up out of nowhere and kills the Walker but good. Andrea stabs the Walker in the eye with a screwdriver, repeatedly. Too bad -- that zombie did some of the best acting on the show this week. Darryl doesn't have time to hide from the Walkers again, so he throws a corpse on top of himself and T-Dog until they pass. I'm so proud of super-racist Darryl for saving a black guy. This is major progress. His brother would be so... disappointed.
When the zombies have barely gone past (and are still close enough to turn around at any noise or sudden movement) people start coming out of their hiding spots. First is Sophia, who immediately gets nearly grabbed by a zombie. Several Walkers are still trailing behind, but none of the others (who can't be more than 100 yards ahead) bother turning around at the commotion. To escape the three zombies, Sophia heads into the woods. Because that's such an excellent plan. Someone needs to teach this kid some survival skills. She keeps running, until Rick grabs her. She tries to grab his gun to shoot them, but he stops her, saying it will draw attention of more Walkers. So he picks her up and starts hightailing it out of there. When he finds a puddle that has a cave with some tree roots, he gives Sophia explicit instructions to hide in the hole until he returns. He says if he doesn't come back, then she should return to the group and gives her very clear directions on how to do that. He draws the zombies away from the little girl in order to take them down one at a time.
Instead of waiting for Rick to get back, Sophia (who has some weird little doll in her hand, which will show up at some point caked in mud... I'm guessing) heads off immediately after he leaves. He dispatches of the zombies pretty quickly with the help of a giant rock. It's great, but we really don't get to see too much of the head trauma.