C-SPAN got a jolt this weekend when political humorist Al Franken attacked the credibility of Fox News Channel's Bill O'Reilly during a televised Los Angeles booksellers' luncheon. A verbal argument ensued, complete with name-calling. Franken was there touting his new book Lies and the Lying Liars Who Tell Them and O'Reilly was promoting Who's Looking Out for You?. You can catch the debate on Sunday at 5:30 pm/ET on C-SPAN2, if you missed it.