Dirty hack to fake overloading of next/prev to invoke arbitrary JS

gistfile1.js

/*
  This is the same principle used in a previous gist: https://gist.github.com/1955854
  In this case, we use blank elements in the slide to provide an animation "step."
  The presenter explicitly hits next/prev to reveal and unravel the animation instead
  of it happening automatically when the slide is made current and leaves the screen.

  The HTML structure be:

  <section class="slide">
    <p>Some normal slide content...</p>
    <div class="slide" id="some-animation"></div>
  </section>
*/

$(document).bind('deck.change', function(event, from, to) {
  var $entering = $.deck('getSlide', to);
      $leaving = $.deck('getSlide', from);

  /*
    If there are multiple animations and they are all unique, set
    up each of the animations by id.  If each animation is the same
    for any slides that have them, you should use a class instead.
  */
  if ($entering[0].id === 'some-animation') {
    // The animation has become current, start the animation
  }

  if ($leaving[0].id === 'some-animation') {
    // The animation is no longer current, animate back
  }
});