[Kransha]

I would think it be Saruman. Anyone can get a hat, even a nice pointed hat like Gandalf's. Deception is Saruman's specialty's, second only to his voice. I don't doubt that he could've done it and did. It seems that Gandalf would have little reason to do what the figure did unless he had a hidden purpose, which is not apparent. He says its not him, we assume its not him, we assume it's Saruman, simple and logical. But that's not the end of it. I commem your perception of this little storyline quirk. Also, what I might say has been summed up by Finwe's post, so I won't bother re-hashing the opinion.