Great video - thanks for posting the link. Clearly, this is a fella with a true feel for his favorite river and literally a very different perspective. I've done some snorkeling in shallow saltwater for the purpose of observing fishes and I've been tempted to try it in some slack areas of larger warm water rivers (Dave Whitlock does it). Rivers with fast current and boulders would scare me away for sure though. I suspect this fella comes from a background in white water kayaking (note helmet) or maybe surfing and he's long ago overcome his fear of crashing waves and white water. Anyway, cool video.