I've seen it at presentation after presentation.
A speaker will say something funny, and the audience will laugh.
Not some pathetic laugh, but a nice big laugh will erupt from the crowd.
And the speaker continues speaking, almost cutting out the sound of the laughter.
And if you're a speaker, all you're doing is being rude.
When an audience laughs, they're having a “conversation” with you.
You've said something. They're saying “something” back.
It's not polite to go on to your next slide—if you know what I mean.
You have to wait. You have to listen to the audience. And only when the audience stops laughing, should you move on.
Notice what happens in a comedy series.
Pick any comedy series, and you'll notice something. The talent waits. They get the audience to laugh. Then they zip it up. They wait. And if you consider that most comedies have dozens of laughs in every episode, that's a lot of zipping up and waiting to do.
And the reason they zip it up and wait is because they're professionals.
They know that any “presentation” is a two-way street.
That by simply moving on to your next slide is not a matter of efficiency. It's a matter of boorishness. And ignorance.
And that if you're truly a great speaker, you'll zip it up.