'The Last of Us' recap: More ground rules and a big dose of body horror

Silence is the key word here. Remember those zombies Ellie mentioned that use echolocation? When the group makes it to the second floor, the ceiling caves in behind them, obstructing their way out. The commotion also attracts two zombies; Joel signals to Ellie that these infected can't see, and move around based on sound. At a certain point, Ellie and Tess split up, and the attention focuses back to Joel, who regroups with Ellie.