R v Paul Chambers (appealed to the High Court as Chambers v Director of Public Prosecutions), popularly known as the Twitter Joke Trial, was a United Kingdom legal case centred on the conviction of a man under the Communications Act 2003 for posting a joke about destroying an airport to Twitter, a message which police regarded as "menacing". The conviction in the Magistrates' court was widely condemned as a miscarriage of justice, but was upheld on appeal to the Crown Court. Chambers appealed against the Crown Court decision to the High Court, which ultimately quashed the conviction.