The waves have been pumping in Hossegor during the early days of the Quiksilver Pro, but that’s not really the story here. Of course the surf’s been firing. September in the south of France is magic. But what really brings the annual gathering together is what goes down when the sun sets. A celebration of unbridled surf culture today, the good times were rolling for the European premiere of Mikey February and Spearhead Unlimited’s new film, “ Sun Song .” Produced in partnership with the wonderful folks at SunBum, the film was shot in Fiji and is billed as “a mixed-media exploration of the cultural impact of surfing through film, music and art.” In other words, a perfect fit for the Quiksilver Festival. Showcasing what’s possible at Cloudbreak when style and power collide, Mr. February is joined by Frankie Harrer, Kobe Hughes, James Kusitino, Lungi Slabb, and Tosh Tudor.…