David was somewhat honored she trusted him enough to hide behind him. "That's wierd Zombies can't throw things. The has to be someone out side." So he goes to the windo and looks out, his rifle not far from him, then he saw someone on a roof and he waved at the mystery person careful not to say anything or wave his hand out side the window. Then he pointed to the entrance and held his fingers showing the number 221 hopefully the man would get the message.