Oh, THAT Fog...

So, my boyfriend and I recently took a trip to San Francisco. The first day or two that we were there, we were like, "I don't see what all the fuss is about with this fog." The next day, we were wandering around the city and we were at the top of a hill, and the wind started to pick up and we look down the street and see... just this WALL of fog rushing up the hill towards us. Like, really intimidating stuff. So, yeah, now I get what they're talking about with all the fog.