I cannot remember this incident as I was only 6 or 7. My parents tell it to me because it really freaked them out at the time. Now my parents are the kind of people that just don't get spooked by anything.
It was in my childhood home and I had a room to myself. Now for a week, apparently, I would wake up in the middle of the night screaming and crying. Of course my parents would rush in to see what the hell was going on. Only to find me hysterical, saying that the monster was at the end of my bed! As usual my parents thought it was just child nightmares. Or maybe our cat had walked into my room.
But one night, as I woke up again, hysterical, just my dad came but this time, he tells me he peeked through the gap in the door before walking in. And he says all he saw was a black mass at the end of my bed. Of course, as he opened the door to go in it disappeared!
After awhile I slept through the night. What ever it was had left. To this day, he can't explain it and admits he was freaked out. A lot of weird things have happened to me or my family. Quite strange.