At the end of your presentation, you may wish to open the floor to questions – to ask if anyone has any questions about your presentation. Now listen to someone asking if there are any questions.

To this end, oral presentations — like papers — must ... Finally, presentations normally include interaction in the form of questions and answers. This is a great opportunity to provide ...

Have you ever heard a speaker end an otherwise effective presentation with an abrupt, "Thank you," or worse, an anti-climatic statement such as, "That's all. Any questions?" or "I'm done"?

Have you ever heard a speaker end an otherwise effective presentation with an abrupt, "Thank you," or worse, an anti-climatic statement such as, "That's all. Any questions?" or "I'm done"?

Because they may involve divergence of viewpoints and possibly competition for speaking time, they are also more difficult to manage than the normal questions at the end of a presentation.