In some TV versions before Billy and his mom arrive at the airport. Mike is seen buying comic books for Billy. Also when they go to the restraunt to eat Later on Billy's mom tells Billy to stop staring at the customers. Finally right after the restraunt scene Billy goes to the pool area where he meets Stu ( the other psycho killer) which is Hal's twin brother. He sees that Billy has his necklace and tries to take it and drown the boy or we, the audience have that assumption.