The 1 second shutter speed and the angle you found to take this picture make a very impressive photo. Also, your choice to throw it to gray scale makes this an extremely powerful piece. It'd be hard to tell whether or not someone would be able to pick out the people on the walkway, but in pointing them out, you do get an awesome sense of scale at an incredible waterfall. Fantastically done, I envy your scenery, Wisconsin is a little short on these kinds of things.