I have no head for heights, and just watching this video has made me jump a number of times! Despite that, I have always loved this picture because of the simple fact I could never even think of something as working up so high. There is something so awesome about these men . . . and the photographers as well.
Ink, Yarn & Beer 
Happy New Year Naomi! Great video, I always thought it was superimposed as all their feet seem to be on an imaginary floor.