When it comes to lullabies, heavy metal probably isn't at the top of anyone's list. And yet, the sleepy baby in this adorable video drifts off to an acoustic rendition of 'Nothing Else Matters' by Metallica. Um, we're pretty sure this isn't what the heavy metal gods had in mind when they wrote the song.

As his father plays the tune on guitar, the tyke coos along and his eyes get heavier and heavier. Eventually, he falls into a deep, contented sleep, where he'll no doubt dream about war, lies and dragon's fire. Oh, wait, that's 'Enter Sandman.'

If anything, this video has taught us one thing for sure -- babies who love Metallica are undeniably cool.