Catherine Yass - High Wire - Tate Britain - Man on Wire

The video piece at Tate Britain by Catherine Yass is worth a look :
http://www.artangel.org.uk/projects/2008/high_wire

The view from the high wire walker's helmet-cam is truly terrifying, especially when he decides to walk backwards  ...

If that interests you, then make sure you you watch Man on Wire about the Frenchman, Philippe Petit, who high wired between the Twin Towers in New York in the 70's - you will weep ...
http://www.imdb.com/title/tt1155592/