A live debate on RT about fake news devolved into a bizarre shouting match between guests who accused each other of being on drugs and "worse than ISIS."
The debate was supposed to be about whether there's a difference between fake news that is completely made up to trick people, and satirical writing that has a larger point.
But things got off to a rocky start when Horner, halfway through his first answer, admitted he couldn't remember the question he was asked.
McKenzie jumped in to accuse him of being "worse than ISIS."
Horner then accused McKenzie of being on acid. McKenzie, in turn, jumped back in to say that RT was the only station he trusted for balanced news.
At a certain point, Horner simply gave up on the interview, turning around in protest and commenting on the set behind him.
The segment, which lasted an excruciating 12 minutes, ended with McKenzie repeating his call for "this muppet" to be locked up while Horner walked around aimlessly.
The cause Paul Horner said he had raised money for is giveindia.org. A previous version of this article listed an incorrect website. We regret the error.