Clooney (left) and Damon in Berlin
Splash News Online (2)
03/23/2013 AT 01:30 PM EDT
All work and no play? Not for George Clooney
The star proved getting a movie done can be plenty of fun if you've got your friends with you – and you've got a late-season dumping of snow. Which is just what the conditions were Friday when he lobbed a snowball at the star of his wartime drama, The Monuments Men
, Matt Damon
Damon responded the only way he could: by whipping a snowball back at the director! Costar Cate Blanchett stayed out of the fray, and according to local tabloid B.Z.
, the production team cheered them on.
Clooney and Damon then got back to work filming a scene outside of Berlin. The film is based on the true story
of an allied division of men and women trying to rescue the great works of art that Nazi troops were pillaging from the countries they conquered.
While Clooney and Damon continue their on-set antics, Clooney's girlfriend Stacy Keibler spends her time shopping and touring. She was especially fascinated by the sausage vendor who carries his grill on his belly