That lady does sound a bit like me. Very sensible to look for rational answers before coming to a definite conclusion on the supernatural.
Now, your man. From what you've said, I doubt he was supernatural. Ghosts (as far as I'm aware) don't eat, since they have no bodies and no need for food. According to the bible, angels ate, but then I don't think they were supernatural. However, that's another story.
You must know that the smallest cut can produce enormous amounts of blood. Injuries often look far worse than they really are simply due to the amount of blood that issues from them. Just how closely did you examine this man's feet? Perhaps his toenails had been very long which was why he felt the need to cut them with the razor blade, and what you saw lying on the ground were long clippings. I have a friend who keeps her toenails very long and polished - like ladies fingernails. They're so long that when she walks in the sand, they leave imprints. I don't know how she does it, but she likes them like that. I think his toenails must have been long like hers.
Don't forget you were a child, Keyplus, and children have very active imaginations - often over-active. Looking at it logically, not only were you a child, but you were a child from a superstitious, highly religious, eastern society, where it's likely that people were easily influenced into believing that anything considered to be a little odd was, indeed, supernatural. In fact, with all due respect, some of the things you believe in and say now, as an adult, with regard to the supernatural, astound me.
A wanderer with long toenails is my verdict.