Casals seems like he was a pretty funny guy. Stolen from Wikipedia:
"American comedian George Carlin, in his interview for the Archive of American Television, refers to Casals when discussing the restless nature of an artist's persona. As Carlin states, when Casals (then aged 93) was asked why he continued to practice the cello three hours a day, Casals replied, "'I'm beginning to notice some improvement...' And that's the thing that's in me. I notice myself getting better at this," Carlin continued."
"American comedian George Carlin, in his interview for the Archive of American Television, refers to Casals when discussing the restless nature of an artist's persona. As Carlin states, when Casals (then aged 93) was asked why he continued to practice the cello three hours a day, Casals replied, "'I'm beginning to notice some improvement...' And that's the thing that's in me. I notice myself getting better at this," Carlin continued."