Did you ever wake up after a dream, and see things in real life world that were present in your dream? And the world you're in changes all of a sudden, making you feel as if you still were in a dream? Like, people change, cars change, the weather changes and you are with that awkward sensation that you could still be dreaming? 
      You wake up in your room and somehow it feels different. No, i doesn't smell different or feel different as you touch it, it's just that deep inside your mind, unexpectedly, it is all a different version from the one before you went to bed...or the couch. 
       There is also the possibility that everything you see has also appeared in other dreams you had, or maybe in the same dream you the night before but you just don't know which dream it was...