The guy that made my jaw drop was just an average Korean guy (I'm korean). He made recording of himself playing songs from X-Japan ("The" famous rock band in Asia from Japan, they play mainly heavy metal). He got one of the songs by X and added his touches.

I can post the link if you want. Could be average stuff for you Notice :) you seem like a knowledgable guy with theory. I just think that guy also knows alot of theory too and thats how he writes his own stuff.