Nazgûl-related blindness?

Those explanations make sense. I've always assumed it was the fall (perhaps a bonk on the head) combined with falling in a shadowed part of terrain. It gets dark quickly in the hills, especially with a storm approaching. As tired and stressed as he was, I don't think it would've have taken much to disorient and temporarily blind him, even without the Nazgul to complicate things. And given hobbits' usual eating habits and Frodo's condition at the time, he might have been experiencing a moment of low blood sugar on top of everything else. [img]smilies/wink.gif[/img] I know what that feels like, to kind of black out without losing consciousness.