HORROR STORY SHORT! !Viewer Discretion Is Advised!

I woke up to tapping, too scared to do any investigating, I hid more under my covers. The tapping grew louder to the point my heart felt it was going to burst from fear. I started tapping on the wall over and over a secret code between me and my parents. But after around 30 knocks in a minute or two, nobody came. I felt something grab my hand. But I was sure I had locked it outside. Where are my parents? WHAT IS THAT THING?!—