Drifting away from the "boring" slide in the conference
In your talk, every slide tells a story.  That story can be as short or as long as you want.  Just like the overview slide tells the story of the whole talk in a single slide, each section of the talk and even each individual slide can be presented at multiple levels of resolution.
Familiarize yourself with the story you want to tell at these multiple different levels of resolution, and you can change the pacing to match the interest level of the audience.  

For example, let's say you've got a slide explaining the details of how you performed a simulation.  You might present this same slide at three radically different levels of detail:


High detail: explain each of the parameters and why you chose it
Low detail: "To study this in simulation, we selected these parameters.  The important choices here are ..." [explain the critical choices]
Minimalist: "We studied this in simulation using these parameters, and ..." [move on to following results slide]


If you are concerned that you are boring your audience, you can shift to a lower detail presentation without actually disrupting your narrative.
This is also a good technique for managing your time, to ensure that you don't go over-time or badly under-time, and can help you customize your material for different audiences.