'Tonight Show' host Jimmy Fallon has always had a lot of fun using fellow NBC anchor Brian Williams as fodder for one of his most popular skits -- making Brian Williams "rap" popular jams. Every time the super-cuts of Williams saying various words (the creation of "hippity" for 'Rapper's Delight' was particularly inspired) hit the web, they go instantly viral, and Williams appears to be a very good sport about them.

Which is probably why he and Fallon spent a good chunk of their interview on last night's show talking about the videos, and it's probably also why Fallon debuted another rap jam for everyone to enjoy. Laid back.