Nigel Farage has been involved in tense exchanges in the European Parliament in its first debate since the UK voted to leave the EU.
Farage told MEPs that they were "in denial" and "not laughing now".
But the Ukip leader - who has campaigned for the UK to leave the bloc for over two decades - was loudly jeered and accused of using Nazi propaganda.
When Jean-Claude Juncker talked about British democracy, Farage clapped slowly, prompting Juncker to ask him: "Why are you here?"
He also accused Farage of lying about using the UK's EU contribution to fund the NHS.
Elsewhere, other MEPs representing other countries in Britain expressed concern over being 'dragged out of the EU' against their constituents' will.
Sinn Fein MEP Martina Anderson said: "If English votes drag us out of the EU, that would be like Britannia waives the rules.
"The last thing the people of Ireland need is an EU border with 27 member states stopped right in the middle of it."
Scottish National Party MEP Alyn Smith pleaded for members to remember that "Scotland did not let you down. Please, I beg you, do not let Scotland down now."
Marine Le Pen, the far-right French National Front leader and MEP, said her colleagues had to "stop sulking" about British peoples' decision.