Apropos of nothing, Jimmy Fallon decided to make a mashup clip of NBC Nightly News anchor Brian Williams faux rapping to The Sugar Hill Gang's classic song "Rapper's Delight" on The Tonight Show on Wednesday night. The result was an instant viral hit and a good follow-up to Jimmy's other stunts during his first week as The Tonight Show's host, including getting The Ragtime Gals to do a rendition of R. Kelly's "Ignition (Remix)" and convincing Jonah Hill to sing the Friends theme song in a #Hashtag-tastic skit. Watch the clip above to see Brian (and Lester Holt!) get down to the rhythm that will make your body rock.

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