Showing a little enthusiasm in your presentations is a great way to bring up the energy level in the room and demonstrate to your audience that you really care about your subject. Enthusiasm is entertaining in itself and audiences will be much more open to the message of a presenter who is clearly excited. They’ll even be more tolerant of a presenter who isn’t perfectly polished if they can tell you care.
Of course your enthusiasm has to be genuine– you can’t fake it. But try to show your audience why you’re passionate about your topic if you want them feel anything.
That said, you probably don’t want to be quite as excited as this kid learning to ride his bike. It might be a little much in a professional presentation.
“Thumbs up for rock and roll!”