Writer-director Marah Strauch made a solid choice for the subject of her feature debut. Her riveting documentary, “Sunshine Superman,” follows the airborne career of Carl Boenish (“rhymes with Danish”), who repeatedly hurled himself off cliffs and buildings, pioneering what we now call BASE jumping. And since he was a cinematographer, Strauch also benefits from Boenish’s cache of phenomenal archival footage.
Indeed, it was a love of photography, not a passion for adrenaline, that spurred Boenish to push the boundaries of what skydivers could accomplish. He got his start filming parachutists for John Frankenheimer’s 1969 drama “The Gypsy Moths,” and it wasn’t long before Boenish was coming up with other harebrained ways to film humans in free fall.
If people can safely parachute out of airplanes, he wondered, why not off cliffs? So he gathered a team to leap from the top of El Capitan, a rock formation in Yosemite National Park.
Decades before GoPros went mainstream, Boenish was equipping his daredevil buddies with multiple cameras so they could capture their heart-stopping journeys in detail. And he took just as many risks to film them. To get the shot he wanted of jumpers running toward the cliff’s edge, he perched himself precariously on a bicycle seat at the top of a ladder suspended over Yosemite Valley.