Forward motion, headfirst & horizontal to gravity!
I was on a recent riverboarding trip down the Kiyotsu river with American and Japanese kayakers, and we encountered massive snow bridges over the river. We portaged the first one but ran the next 3. Very unique experience being in rapids in a snow cave.
Location: Kiyotsu River, Japan
Riverboarder: Josh Galt
Kayaker in tunnel: Ko-Ji Shimizu
Photos: Ko-Ji Shimizu
And featuring a very special guest appearance from Astroboy, the first Japanese anime superhero, helping battle the forces of crazy in the tunnel.