Jimmy Fallon presents Brian Williams rapping Snoop Dogg style!

This is the funniest thing I've seen in a long time! Someone at work showed me this today and I only have two words for you - pure genius! Here is NBC news anchor Brian Williams rapping the Snoop Dogg classic Ain't Nuthin' But A G Thang...

And just when you thought it couldn't get any better, he only then goes and follows it up with a bit of Regulate by Warren G!