One of the most interesting and risky things I do is to put a camera under waterfalls and rapids. In places no one has been or seen.
Here I have found a place where the camera is protected behind a countercurrent in a waterfall. The rocks that the river tried to throw at the camera were stopped by the countercurrent. And that was good, because the glass in front of the camera costs a lot. So then I could ‘safely’ film sea trout and salmon working their way up the ridge.
This is filmed in slow motion, and it gives a good opportunity to get the details. Reality is 3x faster.