The cave was meant to keep them safe from the destruction of the shelling, but for Hawkeye it was like prison. He watched them go in, one by one, ready to be
sheltered. But he stood outside, feeling helpless. His patients were inside but he couldn't do a damn thing to help. Because he was afraid. He'd done so many
things that most people would be terrified to do; he'd dismantled a bomb, for God's sake! What was wrong with him that he couldn't face his fears to take shelter?
At least Colonel Potter and Margaret understood. He was grateful.