What's the funniest way to spook a horse? Cartoonists Matt Diffee and Emily Flake give us a behind-the-scenes glimpse of how jokes get made. Then, comedian Aziz Ansari critiques Hollywood’s casting habits. Journalist Rukmini Callimachi shares her insight into how ISIS views itself. And the screenwriter and director Charlie Kaufman talks puppet sex and existential dread during a tour of the Whitney Museum.