Dillon Danis mocked Logan Paul by wearing the hat he wore in his infamous suicide forest video.
The two took part in a press conference ahead of their co-main event on October 14 at the AO Arena in Manchester and fireworks were expected from the off.
MMA fighter Danis, a teammate of Conor McGregor's, was first out on stage at Wembley Arena and came out wearing an alien Toy Story beanie hat.
The significance of the hat is that it is the same one that the elder Paul wore in the video that ended up getting him cancelled.
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The YouTuber received monumental backlash over a controversial video filmed in Aokigahara, a forest near the base of Mt. Fuji in Japan.
It is known as the "suicide forest" and footage showed Paul and his friends standing around a dead body. The video was subsequently deleted and led to Paul's ties with Dwayne 'The Rock' Johnson being cut completely.
Paul reacted by bringing a poster showing a poster featuring an image of Danis being choked out by a security guard, as well as bringing out a birthday cake where he was lay unconscious.
The hat was hurled in Paul's direction as tempers flared in the press conference, where KSI and Tommy Fury, joined by his dad John, also got into it.
Parts of the cake were thrown at Danis as security had to get involved in stopping a brawl from breaking out. The presser, shown live on DAZN, ended prematurely without any face-offs or questions from the media.
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And that came after Fury Sr, who trains his son Tommy, kicked the tables and caused chaos after growing frustrated with the behaviour of the other combatants.
He took issue with KSI accusing Tyson Fury of ducking Oleksandr Usyk and taking the fight with MMA star Francis Ngannou instead.
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KSI and Fury returned for a tense face-off where it all nearly kicked off again but Paul and Danis both left the building.
Topics: Dillon Danis, Logan Paul, KSI, Tommy Fury
Josh Lawless