Actor Gerard Butler was hospitalized over the weekend when a surfing stunt for upcoming movie Of Men And Mavericks went wrong.

The 300 star was filming in northern California when a large wave brought him crashing down, leaving him struggling to keep his head above the water.

Surfer Frank Quirarte writes in a post on his ESPN Action Sports blog, "Butler was held down for a solid two-waves and took four or five more waves on the head. He was then washed through the rocks on the inside before he was finally able to be plucked out."

"When they brought Butler in he had that 100-yard stare that surfers get after a two-wave hold (down) or near death experience."

Butler was taken to Stanford University Medical Center and checked over for injuries before being released.

The actor's representative tells ET Online, "He's fine. Very scary. They brought him to Stanford University. More scary than anything. For precaution, we all wanted him checked out after it all happened. Came out with flying colors."