The experiment had different consequences for the model’s aggression to the three groups of children. Later, when the detectives discover Jigsaw's new hideout, several officers walk up a caged staircase and are greeted by Billy, who wheels into sight at the top of the stairs on his tricycle and laughs. When Bobby Dagen woke up after his abduction by Hoffman he found himself to be trapped in a cylindrical cage.

Four days after the death of Detective Kerry, Mark Hoffman abducted Jeff Denlon and took him to the abandoned Gideon Meatpacking Plant, where he was forced to participate in their next game. He sports many of Billy's qualities, like appearing on a TV screen, trapping two characters in a familiar "game" and pitting them against each other. While continuing his games, John Kramer eventually targeted Amanda Young, a drug addict and former patient of his ex-wife.After bumping them, John picked it up from the floor and stroked its hair, remembering the loss of his son. Billy appears on numerous screens throughout the queue line of "Saw – The Ride" at Thorpe Park, England, telling riders that they are not worthy of the life they have been given, implicating the ride to be one of Jigsaw's traps. Additionally, it showed to her what the trap would do to her if she failed by presenting her a mannequin's head getting torn apart by the trap.

Shortly after this series of tests, Hoffman set up another game to test two money lenders, Simone and Eddie. In an episode of The Simpsons, Bart takes his adopted brother to see a horror film with Billy the Puppet on screen stabbing someone with a chef knife.In a flashback in Saw III, Jigsaw is seen constructing Billy for Amanda's game, painting the puppet's face. In fact, the study has been replicated with slight changes, such as using video, and similar results were found (Bandura, 1963). In the Internet series Annoying Orange, Billy appears in "Annoying Saw" and "Annoying Saw 2: The Annoying Death Trap", both in which Orange refers to him as " Clownface", " Emo Clown", and " Donald Trump". With such snapshot studies, we cannot discover if such a single exposure can have long-term effects. It was used by John "Jigsaw" Kramer, often appearing on a television screen, or occasionally in person, to describe the details of the traps and the means by which the test subjects could survive.

When he awoke in one of the classrooms he found himself almost entirely naked with eleven chains piercing his body. When the staircase was locked by a mechanism, Officer Baker tried to approach the puppet when suddenly a rigged step sprang forward and broke his shins, causing his two fellow officers to back away and receiving a lethal electric shock when they touched the cage. After some hesitation she tried to get the key but pulled her hand back due to the massive amount of pain. In the scene in Insidious where Josh is working late in the classroom, Billy is drawn in chalk on the blackboard behind him.

In the 2007 film Dead Silence, one of the puppets, who appears on the film's poster and wears the same outfit as Jigsaw's puppet, is named Billy. When Hoffman goes to his hideout after killing Jill Tuck with the reverse bear trap, multiple Billy heads can be seen. When the police arrived at the crime scene, they found the video tape to still be intact, much to their surprise. According to a list of potential Jigsaw victims, Seth was the third person tested after Cecil and Mark Wilson.

According to Wan, the construction of the original puppet's face for Saw involved clay, papier-mâché, and black ping pong balls with the irises painted in for the eyes. He appears sitting on the character-specific prop boxes that appear in maps when the player chooses "The Pig", a licensed character from Saw (who is Amanda Young in her Jigsaw apprentice reliefs). At the same time of Jeff's game, Officer Daniel Rigg was forced to play one of Jigsaw's games on his own. However, as Amanda had manipulated the game, Troy wasn't able to free himself and was killed by the explosion of a nail bomb which subsequently devastated the room.When the corpse was found during an asbestos disposal, Detective Allison Kerry secured the video tape and took it to her office at the police station for further examination. One moment later, the platform folded away, causing Billy to swing forward and hit the glass panel, giving a suggestion of what would happen next.