As you become the movie director your presentation needs (see 4), you'll seek variety. You will need a car chase, without doubt. Maybe two. But no more. These points of change pull back the concentration of your listener: they are a spike in a darkened, over-heated room where the phone ever seduces. Yes, more spikes.
Fast-track your progress with the book.
Awesome Presenting 1: It starts with why.
Awesome Presenting 2: Don't blame PowerPoint
Awesome Presenting 3: Be Clear on the Goal
Awesome presenting 4: Think Movie
Awesome presenting 5: More Stories
Awesome Presenting 6: Brilliant at the Basics
Awesome Presenting 7: Beginning-Middle-Action