Snow, humanish again, scrambles up right after Merrick, kicking one intrepid runner's teeth out on her way up, and once she's on the fire escape proper she leans against the wall and starts digging teeth out of her (many, many) injuries. Apparent they come out more easily postmortem.
"Motherfucks," she says, quietly but emphatically, as she glares down at the zombies, prepared to let the rest of the group lead for here on out unless she needs to destroy more of these things- speaking of which, they seem to be accidentally building themselves a ramp as they fall on each other still trying to reach the tasty flesh snacks. Oops.