Something For The Weekend Sir

I read a comment on a Facebook wall that made me smile in that angelic way I do. It said:

"It's de javu (sic) all over again..."

Does that mean that the fellow had already had one deja vu and was now having another one? Or had he felt as if he'd had a deja vu before and was now doing the thing?

Bloody confusing when you think about it.