Of the countless waves undulating across the planet’s seas, the most exotic might be the glacial tsunami.

Here, big wave specialist Kealii Mamala steps into a wake of near-freezing liquid churned forth by a monstrous chunk of ice calving off Child’s Glacier in Alaska.

The relatively small wave is technically a tsunami, as it is caused by a singular disturbance — in this case, a crashing slab of ancient ice more than 300 feet tall.

Mamala gets lost in the whitewater but rides out the wave, becoming the first human to ever do so on camera. Even the seasoned jetski pilot catches the rush.

What wild wave will this guy ride next?