Jackass began as an MTV stunt comedy series in 2000, created around Johnny Knoxville and a cast performing dangerous, deliberately stupid stunts and pranks. The opening greeting, most famously delivered by Knoxville himself, became the show signature as it expanded into a long running film series starting in 2002. Clips of the intro spread online as a shorthand for reckless behaviour, and the line is now detached from full episodes, used on social media whenever a video promises pain, embarrassment or a stunt that should never have been attempted in the first place.