sentences:  In the first "Saw" film, Billy is seen on a television set by Amanda Young, telling her about the reverse bear trap that was hooked into her jaws, and explaining that the key to remove it is in the stomach of her "dead cellmate" (who is actually a heavily sedated man) lying in the room.After she disembowels the man and frees herself, Billy comes into the room on his tricycle to congratulate her.Later, Adam remembers seeing the puppet in his apartment when the lights went out.