What kind of film/scanner are you using? The resolution seems really low, but I find it hugely appealing. Looks like a photo from the 1900's.
The other guy is right, they just look like specs in the photo, but the fact that you tell us they are paragliders says everything. It's hard to tell, and for me at least, adds to the overall eerieness of the shot.
I'd also say there's something violent about the photo, in the stark contrast, the patches of light surrounded by dark, the rushing water, and the angle of the shot. Very good stuff.