EXCLUSIVEThe guy who laid the smackdown on Barron Hilton's face this week is claiming Lindsay Lohan had nothing to do with the attack ... and his rep tells TMZ the blame falls entirely on Barron.
A rep for Ray Lemoine (yes, really) claims his fists only started flying after Barron refused to leave the house ... and says Paris Hilton's little brother got physical first.
We're told Ray had been renting the house for a few days -- and allowed LiLo to stay there because she was a friend of a friend ... but claims Hilton got all pissy when Lemoine asked him to leave after the party Friday morning.
The rep claims Hilton pulled the "do you know who I am card" but Ray didn't care -- so Barron pushed him ... and that's when things got violent.
We broke the story -- Barron told cops Ray attacked him at Lindsay's request ... but the rep says Ray is adamant Lindsay had nothing to do with his actions.
Still doesn't explain this video.