WTF! JAYSON WILLIAMS JERKED OFF IN A LIMO FULL OF GUYS!

Nowadays, a lot of people might take a pass on getting into a limousine with Jayson Williams, who pleaded guilty to aggravated assault on Monday in the 2002 fatal shooting of his limo driver. But, 10 years ago, pals who did party with the former Nets star in his stretch allegedly found out how weird he could be. Former Scores owner Elliot Osher tells us Williams once invited Osher's late brother, Billy, and a bunch of the staff from his strip emporium to go club-hopping. Osher recalls Billy called him in a panic. According to Osher, Billy said the crew was riding around in the limo when Williams unzipped his trousers and got intimate with himself. "There were no girls there," says Osher. "[Jayson] says, 'This is cool, right? Come on guys, don't worry about it. I'm not gay!'" Osher, who's writing a memoir, says his bro jumped out of that limo. Williams' lawyer, Joseph Hayden, didn't return calls.