Generally, when looking at a photograph, we naturally focus on the subject of the photo without paying any attention on how the photographer achieved such a shot. Fortunately, there are photographers whose subjects are photographers photographing, offering us a glimpse of just what goes into the extreme nature shots we enjoy so much. And apparently, to get such great photos, photographers have to do some crazy things.
Source: http://imgur.com/
Images: http://www.rsvlts.com/