This is incredible! A fan has just discovered something.... so totally awesome!
Let's get to the point, this is a pretty great trailer, right? And the music is quite nice, huh? No, it's the most amazing music you've ever heard!
Nintendo have decided to be themselves and included a little 'easter-egg', which can only be heard when you play the music backwards. Above is original, below is reversed:
The Legend of Zelda: Skyward Sword - GDC 2011 trailer music in reverse by rawmeatcowboy
