Town camp

Mark noticed the look David was giving and sighed. Helpless, he said, "David, we need to go. This wasn't part of the deal. We need to get to Evergreen city and there is still a long way to go there. So let's go. These kids were able to get out of the camp. I am sure they will find a way back to it." With a tinge of seriousness. He didn't want to order him, just because he saved his life. 

David heard him and knew he was right. But both the teenagers grew anxious at the thought of them leaving and forced to go through what they just did. But they cried as they were too scared to face the zombies again. They realized their mistake and wanted to go back. But the way back was too hard of an option for them.