[Source] Boo's Room is a room where Boo, a human character in Monsters, Inc., lives. It is accessed by a white door with pink flowers. At the beginning of the film, Sulley finds a remaining door on Scare Floor F that is still standing after the scaring hours and functional. He peeks into the room, only to find no one inside, but when he exits the room, he finds Boo, who has entered into the Monster World from her room, playing with his tail. Terrified, Sulley places her back into her room, but she comes back into the Monster World. Sulley then picks up Boo and carries her back into her room himself, but trips over some of Boo's toys on his way out and accidentally takes them into the Monster World. As for Boo, she has clung onto Sulley's back.