You don't have to understand Portuguese to understand what happens in this clip of Brazilian TV nature host Richard Rasmussen describe the phenomenon known as a 'tidal bore.' No, not the streaming music service from Jay Z, tidal bores are massive waves that rush up rivers that flow into the ocean when the tide comes in. He's explaining a bore's massive power, and how many trillions of gallons of water suddenly surge up the river as the sea level temporarily rises above the river level—when he turns around and realizes it's about to tidal bore its way right up his asstuary. He and his cameraman haul out of there spectacularly, but be sure to stick around for his celebratory yawping at the end.