Howard Stern is at his best when he’s expelling venomous hatred toward his enemies. One notorious enemy is Jay Leno, who Stern’s been bad-mouthing for years. Their bad blood started when Leno stole one of Stern’s staffers and years later, Stern still won’t relent. So when Jimmy Fallon mentioned Leno to Stern, the Stern fans in the audience predictably went nuts, as did Stern. Apparently, Fallon called Stern for advice about interviewing President Obama and then confessed to Stern that he also called Leno. Stern then said, “Jay Leno’s hasn’t done a good interview ever,” and “I never would have answered you if I knew [that].” Watch below.