This weekend I went to a conference on medieval and early modern economics in honor of John Munro, distinguished professor emeritus at the University of Toronto. I'd never met the man, so in advance of going, I looked at his website, which includes pictures. I arrived at the conference, chatted with people I knew and met new ones. At one point I briefly spoke to someone walking by, which culminated in me asking who he was.
"Oh, no one important," he replied, waiting until he saw I'd figured it out before walking away with a smile.
Some of my fellow students came away still laughing about this. It was the highlight of their evening.