The first script was written by Sergio Esquenazi under the name Kosher Bullets. The idea for the script comes from his experiences at a Chabad House in Los Angeles. Some of the characters like Rabbi Mendi were based on real Chabad people.
Sergio Esquenazi is a big fan of the rock group Kiss, and he wrote the main character, Leo (Peter Lanzani) as a staunch fanatic of the group. ¨I Was Made For Lovin' You¨ , iconic Kiss song, is the music for the official trailer.
Every explosion in this film was real, with no CGI elements.
Second movie together for Santiago Segura and Gérard Depardieu after 'Astérix aux jeux olympiques (2008)'.