It was not really a ghost whom Vijay Singh encountered but a dacoit in the guise of a ghost. This is evident from some facts like:
(a) Ghosts are not visible. (b) They can not be touched by hand. (c) Ghosts possess extra ordinary powers and if it would have been one, it could have easily squeezed and crushed the stone. (d) Ghosts do not need a club to kill humans. (e) Ghosts don’t collect wealth. They do not run away. They just disappear.