This is 6-years-old, but I just happened across it. Friggin' brilliant.
The video only has about 30 seconds of gas IMO, but the mp3 of the original mashup doesn't seem widely available any more.
http://www.youtube.com/watch?v=IuJXdwDrKEk
Edit: Here's the mp3
http://amherstdam.files.wordpress.com/2009/09/gold-mahna-mahna-kanye-west-vs-the-muppets.mp3
And I should add the original mashup is by a dude who goes by Lenlow.