Shia LaBeouf Leaves Press Conference; Reappears at Premiere Wearing Paper Bag

Shia LaBeouf’s bizarre behavior in Germany over the weekend left some wondering if there is cause for concern.

The actor – who’s promoting his new film, Nymphomaniac, at the Berlin International Film Festival – arrived sporting a shaved-down tooth and disheveled appearance for the cast panel, answering only one question before quickly exiting the room.

Matt Damon, George Clooney & Stacy Keibler Dine in Berlin

Three’s company!

George Clooney and Stacy Keibler had dinner with Matt Damon in Berlin on Saturday.

The trio dined at Grill Royal, a hot spot for celebrities in the area, where it looked like Clooney, 51, and Keibler, 33, “were together,” despite rumors of a possible split, an onlooker tells PEOPLE.