The Situation and Ronnie Get Into Explosive 'Jersey Shore' Fight Over Rehab as Pauly D Ducks for Cover

In a sneak peek of Thursday's "Jersey Shore: Family Vacation" season finale, Mike "The Situation" Sorrentino makes one helluva allegation about costar Ronnie Ortiz-Magro during a brutal confrontation.

While having dinner with Nicole "Snooki" Polizzi, Pauly D, Jenni "JWoww" Farley, Vinny Guadagnino and Deena Cortese, Ronnie admits he gets "crazy" when he parties but maintains he never lets it affect his life.

"You made it your life. You let it affect your life. You let it affect your whole life!" Ronnie fires at Mike. "You let it destroy your life. Bro, look at you! You f--king got a tax evasion! You almost lost everything you f--king earned."

"Did you not call me two weeks before we came here and say you needed rehab?!" Mike shouts back. Ronnie says they spoke, but corrects him by saying he asked for "help," not rehab.

"You said you were going to rehab when you leave here!" Mike continues to yell from across the table. "You said you're going to rehab!"

"My rehab's different from your rehab," Ronnie replies.

"Rehab is rehab," Mike says.

"You put people's dirt out there," Ronnie says as he begins to lose his temper. "Your s--t is public! Your s--t is real news! That s--t is on the papers! That's why I talk about it. I don't bring your dirt in the house. I don't f--king sweep your name in the f--king mud. I just say what the facts are."

"You need help," Mike replies repeatedly.

"I don't have a problem, bro!" Ronnie fires back. "I help myself. You never help yourself. Lauren helps you now. I take care of Jen, I take care of my kid, and her f--king kid. Fact! End of the story. Bottom line. So don't ever f--king say I need help."

During a confessional, Pauly -- who spends most of the fight literally under the table in shock -- says, "Mike and Ronnie's dynamic is crazy. They have this history, and it's bad. It was only a matter of time before either Mike or Ronnie would lose their mind, and it is happening."

Jenni adds, "There's a lot of history between Ron and Mike, and they've been having this blow-for-blow, clap-back thing the whole vacation. We're a family, we're here, let's not leave with this bullshit still here. Let's air it out."

Watch the explosive argument on the "Jersey Shore: Family Vacation" finale, airing Thursday at 8 p.m. on MTV.