Painful Scratches.

The sound was like something heavy fell to the ground, then they started hearing sounds of glass cracking. They were glancing around, but they didn't sight where the sounds were coming from. Then Everett suddenly said to them,

"Guys, look up".

They began glancing up slowly at the edifice close to them as they were already in expectant of something, something they'll see. They glanced up, and there were zombies on the glass already close to breaking it finish, just as they expected. The zombies had been there since without doing anything, but the moment they sighted them...they started taking action.

Nothing they haven't set eyes on since they started embarking on this mission. Zombies in the forest, zombies trooping out of a house, zombies breaking out of a store, zombies in a grocery store, zombies falling from a building. Now, the current one that was about to happen was zombies falling from a building.