A topless face-off with Mike Tyson, trashing a stage, headbutting a glass wall - and lashing out at KSI: The bizarre pre-fight antics of Tyson Fury's hellraising father John - as bemused fans brand him 'the most embarrassing man on the planet'

Tyson Fury's hellraising father John was today branded 'the most embarrassing man on the planet' after the latest in a series of bizarre outbursts in his sons' pre-fight press conferences. 

In recent months the 59-year-old has been seen headbutting a glass wall, trashing a stage and being held back by security while making a 'cringe' call out of heavyweight boxing legend Mike Tyson. 

John, himself a former professional boxer, was last seen on Thursday charging down a stage towards Iron Mike and shouting 'do you want to fight me? I can fight you right now' before being held back by security guards.

When his son Tyson posed for a stare down photo with former UFC heavyweight champion Francis Ngannou - who he is fighting in Saudi Arabia tomorrow night - a shirtless John tried to walk in on the shot before being ushered away by a minder. 

In response, Twitter user Jake Best wrote: 'John Fury is easily the most cringe person on planet earth'. A second wrote: 'Hearing John Fury shout ''I fear no man'' has become incredibly boring. Nobody cares, fella.'

When his son Tyson posed for a stare down photo with former UFC heavyweight champion Francis Ngannou - who he is fighting in Saudi Arabia tomorrow night - a shirtless John tried to walk in on the shot 

A shirtless John Fury eventually had to be ushered away by security to stop him getting in the way of the shot 

Social media users made fun of John Fury following yet another bizarre outburst yesterday 

Others made light of the encounter, with one joking: 'I would genuinely love to see John Fury and Mike Tyson get it on for a couple of rounds on the under card. Just for a bit of fun.'

John Fury was born in Tuam, Ireland and had a career as a boxing cornerman and a bare-knuckle fighter. 

He was released from prison in February 2015 after serving four years for trying to gouge a man's eyes out during a brawl in 2010. 

Perhaps his most infamous public appearance was on October 12, when he punched and headbutted a glass panel after storming the stage at the final press conference for his son Tommy's fight with YouTuber KSI.

The pair ended their press conference by having a face-off inside a metal cage with a glass panel separating the pair to avoid a physical confrontation.

But after several minutes of trash talking between the two boxers, John got on stage and into the cage before smashing the panel with multiple punches and finishing off by throwing a headbutt.

He then continued to launch a verbal attack towards KSI before finally being led away by security.

John Fury headbutting a glass panel at the final press conference for the fight between his son Tommy and KSI on October 12 

Fury also landed multiple punches on the glass panel as his son and KSI watched on

Fury had earlier been verbally insulting KSI from the side of the stage at the press conference

John had been heavily involved in the build-up to the fight, having caused the first press conference in August to be brought to an abrupt end when he smashed and flipped tables on stage.

During the press conference, KSI's business partner Logan Paul began criticising the Furys before John rose from his chair and shouted 'the Fury's are the best fighters in the world'. 

John continued by saying: 'The Furys dominate. We are the best men in the world. We will fight anybody in our way.' 

KSI responded: 'Why is Tyson Fury ducking Oleksandr Usyk then? Why is he ducking Oleksandr Usyk?'

John said: 'Full of s***. Full of s***. Shut up 'mother******. Come fight me now instead of talking all this bull**** about people's f****** b*******.

'We are fighting men. My son [pointing to Tommy] will fight him now [pointing to KSI] and then fight anyone else who wants it. Now, lets get the f****** ball rolling.

'Get the cake and shove it up your a*** hole before I do it. All these little f****** kids. I am a machine. Me! Can anyone question who I am here? I will take them'. 

John had been heavily involved in the build-up to the fight, having caused the first press conference in August to be brought to an abrupt end when he had a violent outburst 

John was seen flipping tables and shouting at KSI (far left in the white vest) after the YouTube-turned-boxer threw shade on the Fury name

The YouTuber-turned-boxer was furious and jumped to his feet to square up to Tommy's father, before security swarmed onto the stage to prevent a mass brawl

Unlike his father, Tommy Fury remained relatively calm as the chaos erupted around him 

John finished by knocking the microphones over and flipping his table before kicking KSI's table over too. The YouTuber-turned-boxer was furious and jumped to his feet to square up to Tommy's father, before security swarmed onto the stage to prevent a mass brawl. 

John was also seen squaring off against Logan Paul's father, Greg, after shouting 'I'll wipe the floor with all of you' to his entourage. 

Tommy Fury eventually won the fight against KSI via a unanimous decision. 

Before the bout John had bet KSI £200,000 that his son was win, and yesterday he told the YouTuber he would 'ruin his career' if he didn't pay up.  

'He lost. He's got to man up and pay because I will not let this go,' said John. 'I'll hound him to death. I'll hound him to death,' Fury told IFL.

'So there you go mate, pay up. You wanted to bet in the first place. Be a man.'

John clashed with Jake Paul in November last year after Tommy Fury's exhibition bout with Rolly Lambert 

'You were a sore loser when you got picked on the night. But you're going to pay this money because I'll never leave you alone.

'I will ruin your career. I'm on you like a dog on a rabbit. So don't worry about that. Pay up.'

Last November, John clashed with Jake Paul after Tommy's exhibition bout with Rolly Lambert in Dubai. 

Paul was on commentary for the fight and was heard screaming 'you're f***ing s**t' and 'you've got no d**k' at Tommy while the exhibition was taking place.

John didn't take too kindly to Paul's comments and made his feelings known after the fight. He ripped off his shirt and demanded a fight with the YouTuber-turned-boxer - claiming he wouldn't leave the ring until Paul took him on.