Scratch
I swear this to be true, DM me if you want further details.
I've had more than a handfull of paranormal experiences for as long as i can remember. Worse one was when, in the middle of the night, SOMETHING started knocking very softly at my door. I thought it was my little brother who was around 6 at the time.
Since it was pretty late it took me a while to snap out of my sleepiness and the knocking got harder... Much harder. I was annoyed and yelled ARE YOU COMING THE FUCK IN OR NOT?! I said that since the knocking was increasingly insistent and the doorknob was tilting.
I forgot i slept with my door locked so i felt silly, told myself "how could he ever come in if the door is locked". As i got up from bed that... Thing started knocking at the door so hard i literally thought it would tear down. After the last blow, mere seconds past and then whatever was at the other side started SCRATCHING THE FUCK OUT OF MY DOOR, even trying to get its claws from under it.
It lasted for quite a while and i thought to myself why not 1 person in the house got alarmed by such a racket. By morning light whatever that thing was left, i got out of my room and saw my door completely scratched. It even had some pieces of wood missing. Whatever that thing was, it seems to had only 3 fingers, middle one much longer that the others (scratch patterns in the door).