I GET IT NOW!!!!!!! SHE WAS TAKEN FROM HER MOTHER AND WAS EXPERIMENTED ON BY DOCTORS!!!!!. THATS HOW IT GIVE YOU HINTS IN THE LAST SEQUENCE. In each episode it takes place in a part in her life. In episode 1 it must have been that she was kidnapped from her mother at the door when the hand appeared. Episode 2 is when she was getting experimented on but she escaped by getting on the elevator and was going home. ( I will post a another comment explaining episode 3 and the pictures at the end)