Evil laughter
Me and my family woke up in the night to the sound of manic laughing. Like evil manic laughing. All of us heard it, it was coming from the attic. My dad being not superstitious or scared of anything was white as a sheet. He pulled the attic ladder down and went up to find an old Dairylea Cow alarm clock that had faulty sound randomly going off. Don’t believe any supernatural activity made it go off, just hearing a manic evil laugh in the middle of the night from the attic made us shit ourselves.