Am I Dreaming?

I had that strange "back down to Earth" feeling today that I always get after I've been to a weekend-long event. I was sat at my desk, doing the same kind of work that everyone else does all day, and wondering whether I dreamt the whole weekend. My two "lives" are such a contrast and my fun job never seems real when I'm back to my day job. But maybe that's my real life and this is a dream one. I mean, blue sky? In July? That can't be real, can it?