Sometimes you have to kind of keep proving that you're improvising. That's the game, or the goal, of long-form TV improv, is that you have to kind of keep reminding and showing people that you're improvising, because they won't believe you really.
I certainly never imagined 80-year-olds singing along, like they were watching Cats. I'm fascinated by that kind of pop cultural zeitgeist that it's attached itself to.