I once had the most crazy and surreal feeling of deja-vu when I visited a weird tourist area behind my hotel in San Fran the first time I had ever been to the US. The place was called "Fisherman's Wharf" (or something like that) and I had avoided it during my stay because of the crowds.
Finally I wandered down there to see what the fuss was about and had this crazy feeling of having been there before. I knew EVERYTHING about the place: where steps and shops were - where Alcatraz was... and as I walked to the edge I said out loud "...Sea lions?". And walked around the corner and there they were. Scores of them!
I was starting to freak out, when I turned around and noticed a red hand-rail that lead up to the second floor and realised... Tony Hawk Pro Skater IV.