Oh, very well, Lil - since you ask...
It was during the recording of my now infamous appearance (singular) on Countdown. Sylvia was the celeb in Dictionary Corner, and there was a problem with her clip-on microphone, which was wired discreetly through her clothing. She initially tried to equally discreetly remove it in order to facilitate a replacement, but this was proving difficult, and being the true trouper that she is, aware of the tight schedule for recording a week's worth of shows in one day, she suddenly abandoned all modesty and stripped off her top, revealing her infamous charms, covered only by one of Marks & Spencers finest over-the-shoulder-boulder-holders.
All the more impressive an act, given that she was no longer in the first flush of youth, and she was obviously totally unfazed by the display. Which is more than can be said for several male members of the studio audience, comprising of a handful of bus loads from various senior citizens' organisations around Leeds, and for whom this bold act obviously stirred considerable memories of Carry On days of old - and smelling salts were called for.
Here's a piccy from that day...