A Brazilian television presenter was forced to run for his life while doing a show about tidal bores - after the wave nearly drowned him.
Richard Rasmussen, 36, has been called Brazil's version of Bear Grylls, and has been presenting nature shows on local television for many years.
However, in this instant, nature got a little bit too close for comfort.
Rasmussen, a popular nature show host in his native country, was filmed doing a segment explaining tidal bores. A tidal bore is a wave that travels up a river from the sea, and as Rasmussen explains this event he almost gets caught in one.
Rasmussen can be seen talking to the camera about the phenomenon, and as he turns around to show how amazing a tidal bore can be, it dawns on him that it is about to come down on him.
He is forced to flee the mass of water, running away with the wave hot at his heels.