A young coed was lying in her room alone one night, her roomate had warned her she'd be out late, when she heard a gurgling, groan coming toward the room. Frightened, she jumped in the closet and locked the door. The sound came closer until it was obvious it was right outside the door, then whatever it was began to scratch on the door. It didn't stop for what seemed like a long time, and even after the trembling girl was afraid to move, and eventually fell asleep curled up in the closet. The next morning she opened the door to find her roomate lying dead, her throat cut and her fingers and nails bloody from scratching the door for help.
her nails are bleeding because when you scratch roughly at a door to get attention when your throat is cut because they cut your vocal cords you tend to notice that your fingers get raw and bleed or perhaps you scratch too hard and your nails come off hence the bleeding.