I've watched the video of that trip. I dont think Sack is as dejected as it may seem. My take on the ride was that this oke's got gumption. There was one stage where he came off a lot. He never griped. Just composed himself, shook off the dust and got on with it, time after time.
I think if he did not have his helmet on in that foto you'ed see grit and determination on his face.