Dana Edelson/NBCU Photo Bank/NBCUniversal via Getty (2) One of the many infamous Saturday Night Live on-air slip-ups took place in 2003, when guest host Christopher Walken specularly mispronounced ...

In the 2003 footage, Grohl quietly responded, I think 'Foo Fighters' is the best ... to hear Walken repeat with his distinct voice and accent. "If you're gonna think of a word for Christopher ...