Okay bear with me here, because I have no idea where this came from. I was alerted to it via a post made by ARXIN in this Neogaf thread but this is too incredible not to share...
Play both simultaneously and wait for the fireworks.
To make things simple you can just click this link, which doubles them up automatically (thanks Joab), or use the embedded links below. Trust us. This is worth it.
If you were the genius that came up with this inspired piece of youtube mixing, let us know!