I was summoned to a (potential) customer in the Midlands to give a technical overview of one of my company's products.
It was a product I knew VERY well, so I did no preparation, expecting a meeting with a couple of tech. Staff.
When I arrived, they had readied the lecture theatre, and I was facing about 200 people, from directors, through accountants down to production functionaries.
So, I winged it, with the aid of a white board, I managed to speak for about 20 minutes, got a few laughs and did a 10 minute Q&A session at the end.
The audience applauded.
What a buzz!
I LOVE public speaking - don't get much opportunity these days.
(We sold them about $750,000 worth of kit over the next 18 months.)