6 Mistakes you should never make as a Presenter — Free as in Freedom – "I believe live demos are a recipe for presentation disaster. Forcing yourself to do a live demo is like saying, "Look at how much of a man I am! I'm willing to put my presentation to risk with my bravery!". One of the things you want to do in a presentation, is be in absolute control. I like to minimize the number of things that are out of my control in a presentation situation. Patchy network connections, a bad day with the demo software, and 'errs and ummhs' at the time of presenting are all things beyond my control."