Uncanny and the Shadow

The uncanny according to WIkipedia.org is a Freudian concept of an instance where something can be familiar, yet foreign at the same time, resulting in a feeling of it being uncomfortably strange. in my opinion it means it gives the ability to a person feel the feeling we all know as Deja Vu in a way. Meaning for example i had an experience one day going to the supermarket and for some reason i had the feeling i've been there before and i saw the same people and i went in to buy olives and for some reason i was expecting something to break because i realized that i had a similar dream to this