On a ferry ride to the island of Nantucket, my wife says to me: "don't turn around, but I think Mick Jagger is sitting behind you!"
I said "it's probably Steven Tyler" and sure enough he was slumming it with us on the slow boat.
By the time my wife and I paid up our bill at the Rose and Crown, Tyler's entourage had settled in to their seats. Since it was about the ump-teenth time we had to endure their sizable group during this warm off-season afternoon, I walked over to him and said "Excuse me, Mr Tyler, but could you please stop following me around the island?"
His face went from blank, to startled, to full out laughter and he tried to high five me (I say try, because I wasn't prepared and actually fumbled the opportunity).
He said "I thought I recognized you! but don't worry, it won't happen again." (or something to that effect)
And everyone at his table laughed like it was the funniest line even George Carlin could ever muster, while my wife stood aghast.