Dear Shri Nacchinarkiniyan, I feel such stories are complete fakes, made up to inflate the supposed powers of seeming mendicants who may very well be merely suffering from some kind of mental disorder and nothing more. Stopping trains by sitting near a bush taken from third-hand haigeographical account is very weak. Let them make a missing limb grow back or something. If these people have supernatural powers let them demonstrate it in a controlled environment in front of a skeptical audience. Circular logic to avoid such demonstration is not a proper stand to take. All this would be harmless if it is confined to small pockets. However, according the legitimacy of academic discussion to such stories encourages superstitious beliefs among even those who must know better. IMO, promoting such superstitions is no service to no religion. Cheers!