Jerky easing in jQuery

jquery.jerky.js

(function($) {
    // The bigger the step, the jerkier the animation
    var step = 0.11,
        lastStep = 0;

    $.easing.jerky = function(t) {
        if (t < step)
            lastStep = 0;
        if (t > lastStep + step)
            lastStep += step;
        return lastStep;
    };
  
}(jQuery));

// example usage with jQuery UI components:
$('.accordion').accordion({ animate: 'jerky' });