Shia LaBeouf was detained by cops and put into a police squad car for questioning in L.A. Saturday morning, and only RadarOnline.com has the exclusive video.
And only RadarOnline.com has the exclusive details of what really happened from the man on the other side of the fight, Mark Mastro.
Mastro tells us he was a fan of the Transformers actor and when he saw him inside Mad Bull's Tavern, wanted to meet him.
"My girlfriend saw Shia, and told me. I wanted to get a picture with him so I went over to his table, sat down next to him, and told him I was a fan of his. I called him Mr. LeBeouf.
"He didn't want anything to do with me," says the college student. "He said he just wanted to chill and refused to do a photos. I walked away."
Some time later, Mastro and a friend were out on the tavern's front patio -- basically just a fenced off area off the sidewalk -- and Shia walked out.
"My friend said, 'what's up Shia'?" Mastro says. "Shia told him to 'get the f**k out of my way.' He was slurring his words.
"That's when I said to my buddy, 'don't worry, he's just a f**king fa**ot anyway'," Mastro says.
"He turned around, cursed me out, and I started laughing."
Mastro explains that the actor then jumped in his black truck which was parked directly in front of Mad Bull's.
"All of a sudden, he jumped out, and ran back towards the bar. He charged at me! I jumped over the patio fence onto the sidewalk to get away from him. But he kept coming after me.
"He was getting in my face. He was talking sh*t. He was chest-bumping me."
That's when the bouncer jumped in, Mastro says.
"A bouncer put Shia in a head lock. A cop just happened to be driving by and saw the commotion. He pulled up the bouncer literally handed LeBeouf over to him.
"Apparently the cop called for for back-up because there were at least seven other squad cars there in minutes."
Mastro saw the cops have LeBeouf put his hands up and behind his head. "That's how they led him to the squad car."
Mastro was not interviewed by the police and left the bar with his friends a few minutes later.
The Los Angeles Police Department confirmed to RadarOnline.com that their officers were on scene at Mad Bull's. "I heard was that there was a fight but everyone cleared the scene and no arrests were made," Police Service Representative Ball says.
LeBeouf had a DUI arrest in 2007. A year later, he was busted for being openly intoxicated in a Walgreen's drug store in Chicago, and ended up being charged with misdemeanor criminal trespassing.