They do take a moment to shed their gross lab coats, which is a wise choice. Rick has to shoot up some more zombies (where did he get more ammo?) while Glenn gets the keys, and then they grab the truck and head away from the department store. The others think they're being deserted, but Rick's got a plan. They need to make noise in order to draw the walkers away from the dept. store so that the zombies will be distracted and the others can get in the truck. So Rick finds a pretty red sports car, sets off the alarm and then hotwires it. I think he's going to be driving it into the zombies, but no, it is poor, sweet, defenseless Glenn who drew the short straw yet again. Rick gets to drive the totally safer truck.
Glenn tells the others (via walkie-talkie) to get by the service door and be ready for pick-up, and they grab their stuff and head off of the roof. Only T-Dog stops a moment to consider what to do about the screaming Dixon. Against his better judgment he runs back with the key in hand to set him free, but he knocks over the tool kit, trips and the key goes bouncing off into an open pipe nearby. It's a cool shot, but seems quite unlikely. The others have made their way down through the store, and the zombies are getting closer to breaking down the doors, while Dixon starts accusing T-Dog of losing the key on purpose. Yeah, there's just no way he could have done that on purpose if he wanted to. Still, you almost feel for the screaming racist asshole as he begs not to be left behind as defenseless zombie lunch on the roof. T-Dog does carefully lock the door to the roof, which on first viewing I thought was to keep Dixon from getting down and going medieval on T-Dog, but on second viewing I'm hoping was his way of delaying the zombies from munching on Dixon.
The group stands by the garage door waiting for Rick, while Glenn is getting mobbed in his loud little sports car, alarm still blaring. It does seem to be attracting the attention of some, though not the gaggle of fashion-obsessed zombies who have been diligently trying to break down the door. As Rick lets his newfound friends into the truck, the zombies are hot on their trail. If he notices that Merle's not among them, he doesn't say anything immediately. Speaking of which, he's up on the roof yelling and hoping that the rest of his group rots in hell. Fair enough. Inside the truck, there's finally time to do a headcount, and T-Dog says that he dropped the key. Uh-huh. Like anyone is going to buy that story. Andrea finally wonders where Glenn is, and we see him happily speeding out of town on the empty highway that Rick rode his horse on earlier that day, Yay, he's alive. Though one has to wonder how long that car alarm will continue to go off.