Planetopia, a German TV channel dedicated to covering stories for our planet has asked for permission to include footage from a video shot during a visit to Death Valley early in the year for their show. Excerpts from the video may be watched on the following page(You may see the silhouette of this guy!):

http://www.planetopia.de/magazin/news-details/datum/2010/09/19/mysterioese-steine-im-death-valley-wandern-geroellmassen-umher.html

For the full footage from Planetopia and TV program, you need to have SAT 1 TV channel.

The original YouTube video  may be watched here: