There's Someone Under the Bed

I am an obstetrics and gynecology nurse. Recently, my colleagues have always said to me: "Our hospital is not very clean. You should be careful at night." I smiled: "It's okay, I'm brave." But when I was on duty at night, a strange patient said to me: "Nurse, please help me see if there is anything under the bed?" Then, I lay down under the bed and took a look...