title: jQuery pushStack
body: <p>I need some help to understand <code>pushStack</code></p>
  
  <p>Here I've made an example where the results using it or not are the same <a href="http://jsfiddle.net/Bz5n9/2/" rel="nofollow">http://jsfiddle.net/Bz5n9/2/</a> so I think i really didn't get what is it for.</p>
  
  <p>Thanks!</p>