Actor Shia LaBeouf was at the Troubadour club watching the Lemon Son band on Santa Monica Blvd in L.A. Saturday night, a source tells Usmagazine.com.

"He was dancing around and acting really crazy," the source tells Us. "He kept doing shots of whiskey.

"He stayed until the band was done and then stumbled out of the club by himself," the witness reported.

LaBeouf's Transformers co-star Isabel Lucas, 23, was a passenger in his truck when the accident occurred, a second source tells Us.

Meanwhile, the 22-year-old actor's mom told Us this afternoon when reached by a reporter: "He is doing really well... Thank you so much for asking."

Shia was arrested for drunk driving after a crash in Hollywood early Sunday morning.

He "showed outward signs of intoxication," Los Angeles County Sheriff's Sgt. Scott Wolf told Us.

"Officers at the scene determined that neither his passenger, nor the other driver, were seriously injured so the charge is misdemeanor DUI," Wolf explained.

Attorneys for Shia confirmed late Sunday that "an automobile accident involving an additional party occurred." The actor, his passenger and the other driver were treated for minor injuries at Cedars-Sinai Medical Center in L.A.

"Shia is currently recovering from extensive hand surgery with plans to return to work on the set of Transformers 2 within one month," his lawyers said in the statement.