Footage has emerged of the moment a vicious fight broke out on an All Nippon Airways flight from Tokyo to Los Angeles.
One man, who was reportedly drunk, was arrested after the incident, which took place while the plane was still on the runway in Tokyo, reports Euro News.
A fellow traveller called Corey Hour managed to capture the brawl on camera.
According to the Telegraph, Mr Hour said one of the men "literally just flipped", adding: "Nobody knows why".
He explained that the man being attacked in the black T-shirt said: "Someone help! This guy is crazy!".
The other man reportedly then shouted, "I'll kill you!".
Mr Hour tweeted that the angry man also responded: "You think I'm crazy? What about the government!" Then exits the plane. 1.5 hours later and we finally take off."
He yells, "You think I'm crazy? What about the government!" Then exits the plane. 1.5 hours later and we finally take off. 😴 jfc— Corey Hour (@CoreyHour) May 1, 2017
A female flight attendant trying to intervene appears to get struck by the angry man in the red T-shirt.
The attacker appeared to scream about the "government" throughout the incident.
Mr Hour added: "He was actually predominantly talking about the government and corruption, but he wasn't specifying which government."
The American man, aged 44, was removed from the plane and arrested and charged.
Mr Hour shared another tweet that said airline staff dealt with the situation with "grace and respect".
For the record ANA staff and passengers handled the situation with grace and respect. They did the best they could to diffuse the situation.— Corey Hour (@CoreyHour) May 2, 2017
An airline spokesman told the Washington Post: "All Nippon Airways apologises to our passengers on Flight#6 to Los Angeles for the pre-flight incident.
"The individuals involved have been dealt with appropriately by local law enforcement."