Everyone can do a half decent Christopher Walken impression. But in the case of Dave Grohl of the Foo Fighters, he can REALLY do a good Walken impression.
During an interview recently, Grohl recalled the time that the Foos were the musical guest on Saturday Night Live and Walken was hosting. Before introducing the band, Walken asked Grohl if the emphasis was on "Foo" or "Fighters" in their name. Grohl intentionally lied to Walken and the result was incredible. And Grohl's impression of Walken was extra incredible!