The helmet cam allows you to leave the soundtrack to nature. Actually very peaceful to watch. With my mouthcam I'm obligated to add music as my breathing drowns that out.
That was Big Left on a very rare occasion that I had it to myself. Fantastic conditions! Yep, still working on mounting the GoPro correctly... And I was riding my 9.1 Acid - if I ever lose some kg's (94 kg now) I'll get back on the smaller boards...