A good pitch should be a crescendo of energy and excitement. Ideally it goes up all the way through the story. But it is hard to avoid even for the best story tellers that in the middle of the presentation the audience attention drops a bit. Make sure to bring everyone back to the tip of their chairs at the end tough.
A sure energy sapper is a last presentation slide full of bullet points that recap the entire presentation. "Oh no, he is going to read out the entire thing!" When the presenter is at bullet 2, the audience has finished reading the entire page full of things they already heard over the past 20 minutes.
A better approach is to repeat one crucial visual, diagram, image on the last page that reflects a key point in your presentation. It will be visual memory anchor point for your entire presentation.