awkward

I'm walking down the "hallway" between cubes, heading back to my desk from upstairs. There is this guy that I don't know but see around once in a while. He is always wearing this kind of hunters/ski cap with flaps pulled down. Odd... but who am I to say what is in fashion... I usually use the "avoid much eye-contact" or a quick "Hey" when passing people. As I get close we make eye contact and he locks on. As I get close he backs up against the cube hallway wall, continues looking at me, kind of giggles, and says, "I had to bring in my own chair from home" and giggles some more. "Oh", I reply, and quickly hurry on my way.