Good upside down entry. The sun setting there makes the viewer know that this wasn't just flipped. Lovely lighting. I'm sure folks either love or hate the sun being blown. I wish his head were positioned differently for better silhouette. But, I imagine hanging upside down does not lend itself well to posing. :)
Cool silhouette and I like the fact that the guy is so obviously hanging upside down on a rockface or similar. The sun is a little blown and I think a slightly different angle might have made for a more pleasing composition as far as the suns position goes.
A nice silhouette but that rock in the background really spoils the outlines of the climber. If you had taken the picture a little more to the left you would have eliminated this.