A few years back was in an express train travelling for work with colleagues and a lady just in front started a marketing presentation for her client on zoom, sharing with the entire carriage.
My like-minded friend and I looked at each other with a wink and we were this close to start a super loud mega inappropriate converasation in the background.
But because our boss was sitting just behind we just ended up talking loudly about music or something.
She never paused and finished the damn whole power point.