Martin wrote that happy slapping "began as a youth craze in the UK in late 2004. Children or passers by are slapped or otherwise mugged by one or more of a gang while others record the event on video and then distribute it by phone or Internet. Initially the attacks were, as the phrase would have us believe, fairly minor pranks ... As the craze spread the attacks became more vicious—often serious assaults known in legal circles as grievous bodily harm."