ONE minute these two blokes are full-on bashing each other with grappling moves Conor McGregor would be proud of, the next minute it looks like they're best mates.
The incredible altercation, which was captured on an unspecified Sydney train service yesterday, was caught on camera and uploaded onto Facebook by a baffled commuter.
It's not clear what started the brawl, but the footage shows a man in a blue singlet and cap starting to yell at a bespectacled passenger.
A sweary row ensues and the man in glasses asks the singlet-wearing bloke to "f*** off" back to his carriage.