The movie crew was in its second day of work in Apollo on Tuesday and was planning to wrap up there Wednesday, said John Adkins, a location manager.
Apollo is the latest Alle-Kiski Valley community to be used for the filming, which has included Avonmore, Kiski Township, Salem Township and Worthington.
"We got it!" Erika Anderson of Lower Burrell said after getting pictures of her son, Brendan, 9, and daughter, Alexis, 7, with Damon and autographs for them.
Damon didn't have enough time to attend to everyone, even in the rather small crowd that encircled him, but Anderson made sure she got what she was after.
"I shoved them right up there," she said, then told her kids, "You'll be the only ones in school who can say you touched Matt Damon."
The production began filming in town on Monday, and is finishing Wednesday, a day ahead of schedule, Adkins said.