Gullfoss (which means golden waterfall in Icelandic) is a huge and powerful waterfall running down into a deep canyon in southwestern Iceland. Angling a pole with a camera over the edge gives this scary point of view when looking straight down. The ground is covered with an amazing thick carpet of mossy grasses that grows up to and over the ledges of the cliffs making it very tempting to get very close to the edge.
Aldo is playing radio harmonica and Jook is using his body to send out a big Tesla wave.
Read more about Gullfoss at http://en.wikipedia.org/wiki/Gullfoss