Remember the Legend Of Zelda: Skyward Sword trailer that Nintendo released at this year's GDC? Turns out that if you play the music featured in the trailer backwards it sounds very similar to Zelda's Lullaby, a tune that has featured in many Zelda games from Link To The Past right up to Spirit Tracks.
This is just one of six musical secrets chosen by ONM in its Nintendo's best musical secrets feature that makes for interesting reading for any Nintendo fanboy.
Other easter eggs featured include Super Mario Bros. 3 Warp Zone theme in Super Smash Bros Brawl, the Famicom Disc System's startup tune on the GameCube startup menu and the Kokiri Forest theme in The Legend Of Zelda: Wind Waker. Have a look.