 </div>
    </section>

    <section>
      <h2>.dn-bounce-right</h2>
      <button ng-click="dn_bounce_right=!dn_bounce_right">Toggle Class</button>
      <div class="element" ng-class="{'dn-bounce-right':dn_bounce_right}">
        ...
      </div>
    </section>

    <section>
      <h2>.dn-rotate</h2>
      <button ng-click="dn_rotate=!dn_rotate">Toggle Class</button>
      <div class="element" ng-class="{'dn-rotate':dn_rotate}">
        ...
      </div>
    </section>

    <section>
      <h2>.dn-rotate