What do you mean? The camera? It's an Olympus D-520 zoom, no special settings used. The file tells me it was a 1/200 second exposure, so the water's just moving really fast. :)
I think it's a combination of dark, shadowed rocks and sunlight on the water. Plus that part of the falls is 167' tall, so it's going pretty fast. :-D
(we'll see how the ones I took on film came out when I finally get them developed)