title: Absolute positioning inside relative positioning?
body: <p>According to W3Schools (<a href="http://www.w3schools.com/css/css_positioning.asp">http://www.w3schools.com/css/css_positioning.asp</a>):</p>
  
  <blockquote>
    <p>Relatively positioned elements are often used as container blocks for
    absolutely positioned elements.</p>
  </blockquote>
  
  <p>Why is this? Is there a good example?</p>