My friend and I saw Rick Pitino at a Boston restaurant (okay TGIFs at midnight one weeknight) in college. He was at that time the coach of Boston Celtics. He sees my friend and I walk up and he's ready to say "not now" but my friend only talks to the assistant coach who was about 70 about how much he loves him and all that. I didn't say anything but heard Pitino say to 3rd guy "Did you put him up to this?" We did say "later Coach" but it was so great. Because he didn't want to be bothered, but he was more bothered by not being bothered, while the other coach was so happy to be noticed for a lifetime of work. My friend was sincere.
That's how I felt about Paul Simon. They called his name, so he told himself, well they must want me on stage, so I'll go, but they didn't and it was super super awkward.