...if you rehearse your presentation 10 times. If you do rehearse so many times, you will come out as spontaneous and confident. Your audience will like you and you will be able to deliver the presentation without butterflies in your stomach. Try it once. Rehearse your talk 10 times and see the difference it makes. Rehearse it by actually standing and delivering the talk (along with your slides), the way you would do when you 'will be' presenting.