1. The curse of knowledge, you are so deep in the material that you:
   • Cannot see anymore what points of your story are obvious to an audience, and which points are not (and vice versa, which points are difficult to understand while you think they are very clear
   • Cannot see anymore which details are important / add flavour to the story, and which details are tangents that lead to nowhere
      
2. You probably hang on to a story structure that you designed for your first presentation a long time ago. Your company and your story has moved on, but your slide deck has not.

Art: Franz Marc, Die großen blauen Pferde (The Large Blue Horses), (1911)