When presenting the reveal.js interaction model is to hit space or some other navigation key.
I’m not defending it, because I legitimately think their multidimensional view is horrible for post facto sharing, especially on mobile. But it does mean that you can quickly navigate between chunks of the deck if you need to backtrack as a presenter.
That's actually not a terrible idea... depending on if people ask questions or if you have extra time while presenting, the ability to take a small detour would be pretty cool