Happy Slapping is a 2011 Canadian drama film about disaffected youths, teen angst and bullying. Its title is derived from the "happy slapping" fad which began in Britain where teens assault strangers on the street, film the encounters on their smartphones and circulate them on mobile phones or post them on user-generated websites. Filmed in Montreal, the film was written and directed by Christos Sourligas and co-written by Andrew Farrar (aka Annakin Slayd) and was shot by the actors on iPhones making it the world's first feature film shot entirely on smartphones.