Learn Korean While.....Sleeping?

I'm always on the lookout for new ways to learn foreign languages, and today I came across sleep learning. The theory is that while you sleep, you play your target language very softly in the background and your subconscious will absorb the information. You can buy special cds that have the language with a music track over it (subliminal learning), or you can just use the cds you get with any typical language course. One video I found on youtube was of a guy who just put his cds on in the background while he did other things and was otherwise distracted (like internet surfing, cleaning, etc.). He said when he went to study the lesson, he had all of these phrases in his head and that the words came to him very easily. So then he tried sleeping with the cd on repeat all night and found that the same thing had happened.

         

Now, I'm not saying that you'll wake up and speak a foreign language fluently, but this technique does make sense. It's almost the same as listening to Korean music over and over or watching dramas. Certain words and phrases are so common (like 오빠, 사랑해, 뭐, etc.) that you can't help but learn them subconsciously. But this theory takes that to a whole new level because you're not focusing on the words like you would if you were listening to music or watching a drama. At the very least, I'm going to try it out and see what happens. I'll get back to you!