I once was at a branch of Waitrose to resolve a problem with one of their tills (I am a field service engineer, EPoS), when I heard a familiar voice. Looking around, I saw Ronnie Corbett discussing a problem he had with something he had previously bought. He was calm, considerate, and (according to the staff) a lovely person to deal with, and a customer they treasured. I initially was tempted to go over and say hello (and thank him for all the pleasure he had given me), but I then went with the attitude that, at that moment, he was Mr Corbett, a customer of Waitrose, and not Ronnie Corbett, professional comedian.
RIP, Ronnie Corbett, and thank you for all the times you have made us laugh and smile. This is the greatest gift you have given us; laughter.