the production of Billy merchandise, as well as references in other media and its use in promotions for the films. "Hello Zepp" "Hello Zepp" is a piece of instrumental music that was originally composed by Charlie Clouser for the first film in the series. In Saw, the implied villain, Zep Hindle, is revealed to actually be a victim of the Jigsaw Killer. (The character's name in the script is spelled "Zep", whereas the music titles are spelled "Zepp" as a reference to the popular 80s band Zapp.) As the series continued, the piece was reused in every film as a leitmotif, often being renamed and remixed to accommodate the changing situations and characters. The music was used in every Saw ending, usually during the revealing of plot revelations and twists which Saw films often use and it serves as the main theme tune for the whole films. Traps An important component of each film is the variety of (usually mechanical in form) traps Jigsaw and his apprentices use on their captives to communicate his message. According to David Hackl, all of the traps are real objects, and not CGI. They were designed to look horrific but ultimately be safe for the actors in them. Writer Marcus Dunstan said: "It's built to function there on the day", and added: "It works. So if there's a scalping chair—there really was a chair with working gears to grind and pull your scalp back." The most potentially dangerous item was a "water box" used in Saw V, in which one of the actors (Scott Patterson, as Peter Strahm) had to keep his head submerged as long as possible. Another element of the traps is that Hackl desired a specific look of rust and menace, but he also wanted them to have a type of beauty about them. Reception Box office performance Saw grossed $18.2 million its opening weekend and had become Lionsgate's second-best opening, after Fahrenheit 9/11 (2004). Saw went on to gross worldwide, and is the third-lowest-grossing film in the series after Jigsaw and Saw VI. At the time, it became the most profitable horror film after Scream (1996). It is the seventh-highest-grossing Halloween opening weekend. Saw II opened at number one with $31.7 million, and set a Lionsgate Halloween opening weekend record and is also the third-highest-grossing Halloween opener. It became at the time, the widest release in Lionsgate history and one