My mom would sometimes have us play a game called ‘Army,’ which consisted of me, my mom, and my siblings Army-crawling around our apartment. Kind of like hide-and-seek. She would yell ‘hit the deck!’ randomly and we would all drop and find a hiding spot.
We would giggle and giggle while my mom Army-crawled around looking for us. We loved the game so much. I realized a few years ago while retelling the story that we lived in a really terrible neighborhood, and she would yell it out when she heard gunshots outside the building. I’m assuming she was worried about stray bullets.