|Chad Smith as Ricky Bobby|
Will Ferrell had a video on Instagram saying he's Chad Smith.
Chad Smith made a reply video telling him to quit impersonating him, and challenged him to a drum-off.
Then of course hosted the drum-off on his show. Video of the drum-off via +J.P. Harvey
On top of all that, there's a hilarious reference to the Saturday Night Live "more cowbell" skit, which happens to feature Jimmy Fallon in the background that can't keep a straight face. I really do love the internet.