CoCo back at 30 Rock

[Bob Jersey]

“The first thing that will hit you — and it will hit you, too, because one day you’ll have this show as long as you want it,” O’Brien said to Fallon, “but when you’re 98, you’ll move on and someone else will be in this studio. When someone else is in your studio, it feels weird.”

That was a reference to Kelly C, not Jimmy...

https://variety.com/2024/tv/news/conan-obrien-tonight-show-return-weird-nbc-jimmy-fallon-1235965865/ (link)

...or, if you'd rather just see the segment, https://youtu.be/5U3AbG97V1I (link)

B