anchor.diff:      </div>
       <div class="medium-4 columns">
         <div class="callout" data-equalizer-watch>
  -        <!-- TODO -->
  -        <img src= "#">
  +        <img src= "http://foundation.zurb.com/sites/docs/assets/img/generic/rectangle-1.jpg">
         </div>
       </div>
     </div>
  
positive.code:       </div>
        <div class="columns small-6 right" data-sticky-container>
          <div class="sticky" data-sticky data-anchor="example1">
            <img class="thumbnail" src="assets/img/generic/rectangle-3.jpg">
          </div>
        </div>
      </div>
  
negative.code:     </div>
      <div class="tabs-panel" id="panel6">
        <p>six</p>
        <img class="thumbnail" src="http://foundation.zurb.com/sites/docs/assets/img/generic/rectangle-8.jpg">
      </div>
    </div>
  
  <h2>Thumbnail</h2>
    <div class="row">
      <div class="small-4 columns">
        <img class="thumbnail" src="http://foundation.zurb.com/sites/docs/assets/img/thumbnail/01.jpg" alt="Photo of Uranus.">
      </div>
      <div class="small-4 columns">
        <img class="thumbnail" src="http://foundation.zurb.com/sites/docs/assets/img/thumbnail/02.jpg" alt="Photo of Neptune.">
      </div>
      <div class="small-4 columns">
        <img class="thumbnail" src="http://foundation.zurb.com/sites/docs/assets/img/thumbnail/03.jpg" alt="Photo of Pluto.">
      </div>
    </div>
  
  