If you hear a knock upstairs And you're home alone what could it be?
It could be something that has fallen down that was placed so close to the edge. However, it would be wise to go upstairs and check what has caused the knock.
Don't look I guess lol
A limb either hit the top of your house or a squirrel jumped down on the roof paranormal isn't real
Boogey Man, Slender Man, Chucky, Michael or nothing at all.