Google's Sergey Brin is well known for his reluctance to do interviews or show up in public, he has better things to do.
He is also renowned for his interest in cutting edge technology, like the wearable computer, Google Glass, which he has been working on recently.
He's also one of the wealthiest people on the planet, so finding him riding the New York subway, sporting the high-tech glasses no less, is surprising, to say the least.
Granted, that's one benefit of staying out of the limelight as much as possible, most people won't recognize him even with the Glass glasses on.
Then again, most people aren't wearable computing enthusiasts like computer geek Noah Zerkin who recognized not only him, but also the glasses.
He had a brief conversation with Brin and snapped a photo of him in the subway. Brin was apparently traveling alone, doing his best to just blend in, quite a feat on its own, glasses or not.