Overlapping shadows?

dabblet.css

/**
 * Overlapping shadows?
 */

font: bold 600% sans-serif;
letter-spacing: -.2em;
text-decoration: line-through underline;
text-shadow: 1em 1em rgba(0,255,0,.5);

dabblet.html

Overlapping

dabblet.js

// alert('Hello world!');

settings.json

{"view":"split-vertical","fontsize":"100","seethrough":"","prefixfree":"1","page":"css"}