This Movie continues to make you confused till the end, with some obvious hints. Takes to from one reality to another. absolutely recommended.
Spoiler- there were some hints, which gave the idea of the man being in delusion or dreaming, still you can't be sure until you see the ending . A second you are just angry with psychiatrist, or adoring the efforts of the man and at the very other second, you see the man going crazy. What a trip.