Last month I completed a 3 week adventure on the Colorado River, from Marble Canyon to Lake Mead. Prior to the trip my boat-mate told me about a standing wave him and some friends were riding with kayaks and sleeping pads and said I should definitely bring my mat. So I did. And here is some footage to prove it.
River water dynamics are a world unto themselves. The feeling of being sucked through the pour over & bashed about by the frothing, churning whitewater is unique to say the least. Like nothing I've ever experienced!