That night, he suddenly said, Mom, can I sleep in your room tonight? I didn't think much and agreed. At three o'clock in the morning, I felt something was wrong behind my back, and a cold feeling ran up my spine. I slowly turned sideways, and through the moonlight outside the window, I saw my son's eyes wide open, staring in the direction of the door, with cold sweat on his forehead. I followed his line of sight and looked over - there was a pair of feet in the crack of the door. Just as I was about to speak out, my son tightly covered my mouth, tremblingly came to my ear and said four words. My whole scalp was numb and my hairs stood on end. It turned out that that day was not the first time he saw it at all.
