I've HEARD one before. But never seen- no wait..! I have seen one! Like it was like it was already retreating to the other room and I turned around just in time for me to catch a glimpse of its arm or smthn? I thought it was my grandma trynna prank me so I just waited for her to peek out and check on me but she didnt. So I snuck around the corner and RAN AS FAST AS I COULD when I realized no one was standing there! And just as I was about to enter my room, I saw my grandma coming into the house from outside. I slept with devotional songs playing in the background that night.