title: Why aren't my ball (objects) shrinking/disappearing?
body: <p><a href="http://jsfiddle.net/goldrunt/jGL84/42/">http://jsfiddle.net/goldrunt/jGL84/42/</a>
  this is from line 84 in this JS fiddle. There are 3 different effects which can be applied to the balls by uncommenting lines 141-146. The 'bounce' effect works as it should, but the 'asplode' effect does nothing. Should I include the 'shrink' function inside the asplode function?</p>
  
  <pre><code>// balls shrink and disappear if they touch
  var shrink = function(p) {
      for (var i = 0; i &lt; 100; i++) {
          p.radius -= 1;
      }
      function asplode(p) {
          setInterval(shrink(p),100);
          balls.splice(p, 1);
      }
  }
  </code></pre>