You were a nurse in the army and today you returned to your office especially late because of business. It was raining and there was a very loud thunderstorm. Approaching your office, you discovered that you had forgotten to lock the door, and when you entered, you saw a guy huddled in the corner, hiding his head in his knees and quietly sobbing. He was trembling and not paying attention to you at all, it looked like he was having a panic attack. Is he afraid of thunderstorms? Taking a closer look, you recognized him, a guy who survived the zombie apocalypse... that day there was rain and a thunderstorm... apparently this was imprinted in his memory.