DEJA VU???

Have you ever recall an instance when you were in a situation and you feel that it has already happened before and thinking you already know what will happen next? or ever been in a place you've just visited and you feel like you have knowledge of the place? This phenomena is called Deja Vu.

Deja Vu according to wikipedia.org is the experience of feeling sure that one has witnessed or experienced a new situation previously, although the exact circumstances of the previous encounter are uncertain.
Deja vu is a French word which literally means "already seen".

A Swiss scholar Arthur Funkhouser said that there are several Deja experiences. In a situation wherein you are go to a place for the very first time and suddenly you have the feeling that you've already been there in the exact place, same spot, that thing is called the DEJA VISITE or meaning already visited.  If you been into a party or somewhere else with family members or a group of friends and discussing on a topic and there is a feeling that this very thing had already happened, talking same topic,  with the same group, family member or a friend the phenomena is called DEJA VECU or already happened. If suddenly a person has felt something and that feeling is something that he already felt in the past or very similar to what he is feeling at present the mental phenomena is called DEJA SENTI.
Deja vu occurs to in individuals with or without medical conditions,. 
There are psychoanalyst who attribute deja vu to as simple fantasy or wish fulfillment while others claimed that it was a mismatch in the brain that causes it to mistake the present to the past and to many parapsychologist,  it said it is something related to past-life experiences but scientific researchers claimed that this mental phenomenon not a psychic thing, precognition or prophecy but merely just an anomaly of memory which gives the impression that an experience is being recalled.

Is this thing a psychic ability or is it just a mere case of CRYPTAMNESIA which is an occurence where an information learned is forgotten but somehow stored in the brain and an instance or occurences invoke the stored knowledge which leads to a feeling of being familiar to a situation or event?