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The article was well-written, but (I can hear the flame-throwers warming up) I think more emphasis on what can be done if things go wrong DURING the presentation and not before may have been more appropriate.
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My point exactly. I do find the tips useful, but for preparing for the presentation and not while you're in the middle of it. What actually threw me off was the article's lead: you're called to the stage, then things go wrong. I'd have preferred to read about things that can go wrong during a presentation and what to do about them.