These are a number of Hidden Audio Codes, in which they play audio once you post them in a comment. It is basically hidden and play in the background and it would annoy the hell out of the person who gets this. All you have to do is choose on of the audios you want and post the comment.
 

Audio Comments

Your Gay

<embed src="http://prankspace.com/audio.php?id=youregay.wma" autostart="true" hidden="true" loop="true"><p>Check Out <a href="http://www.prankspace.com">prankspace.com</a></p>

Fart Noises

<embed src="http://prankspace.com/audio.php?id=mnop3.wma" autostart="true" hidden="true" loop="true"><p>Check Out <a href="http://www.prankspace.com">prankspace.com</a></p>

Your Gay (#2)

<embed src="http://prankspace.com/audio.php?id=myspaceboy-yourgay.mp3" autostart="true" hidden="true" loop="true"><p>Check Out <a href="http://www.prankspace.com">prankspace.com</a></p>

I like You

<embed src="http://prankspace.com/audio.php?id=i-like-you.mp3" autostart="true" hidden="true" loop="true"><p>Check Out <a href="http://www.prankspace.com">prankspace.com</a></p>

I Love You

<embed src="http://prankspace.com/audio.php?id=i-love-you.mp3" autostart="true" hidden="true" loop="true"><p>Check Out <a href="http://www.prankspace.com">prankspace.com</a></p>

I Hate You

<embed src="http://prankspace.com/audio.php?id=I-HateYou.mp3" autostart="true" hidden="true" loop="true"><p>Check Out <a href="http://www.prankspace.com">prankspace.com</a></p>

Your Dumb

<embed src="http://prankspace.com/audio.php?id=your-dumb.mp3" autostart="true" hidden="true" loop="true"><p>Check Out <a href="http://www.prankspace.com">prankspace.com</a></p>

Your Retarded

<embed src="http://prankspace.com/audio.php?id=Your-Retarded.mp3" autostart="true" hidden="true" loop="true"><p>Check Out <a href="http://www.prankspace.com">prankspace.com</a></p>

Whats Up

<embed src="http://prankspace.com/audio.php?id=what-up.mp3" autostart="true" hidden="true" loop="true"><p>Check Out <a href="http://www.prankspace.com">prankspace.com</a></p>

Slap Me

<embed src="http://prankspace.com/audio.php?id=slap-me.mp3" autostart="true" hidden="true" loop="true"><p>Check Out <a href="http://www.prankspace.com">prankspace.com</a></p>

Hit Me

<embed src="http://prankspace.com/audio.php?id=hit-me.mp3" autostart="true" hidden="true" loop="true"><p>Check Out <a href="http://www.prankspace.com">prankspace.com</a></p>

Hello

<embed src="http://prankspace.com/audio.php?id=hello.mp3" autostart="true" hidden="true" loop="true"><p>Check Out <a href="http://www.prankspace.com">prankspace.com</a></p>

Hey

<embed src="http://prankspace.com/audio.php?id=Hey.mp3" autostart="true" hidden="true" loop="true"><p>Check Out <a href="http://www.prankspace.com">prankspace.com</a></p>

Showing some love

<embed src="http://prankspace.com/audio.php?id=showing-some-love.mp3" autostart="true" hidden="true" loop="true"><p>Check Out <a href="http://www.prankspace.com">prankspace.com</a></p>

Laugh Out Loud

<embed src="http://prankspace.com/audio.php?id=lol.mp3" autostart="true" hidden="true" loop="true"><p>Check Out <a href="http://www.prankspace.com">prankspace.com</a></p>

Haha

<embed src="http://prankspace.com/audio.php?id=haha.mp3" autostart="true" hidden="true" loop="true"><p>Check Out <a href="http://www.prankspace.com">prankspace.com</a></p>

Shut Up

<embed src="http://prankspace.com/audio.php?id=Shut-Up.mp3" autostart="true" hidden="true" loop="true"><p>Check Out <a href="http://www.prankspace.com">prankspace.com</a></p>

My Humps

Milkshake Mix down