Lenny Marcus performed Friday night for his third time as a stand-up comedian on Late Show with David Letterman, and the third time actually is charming if you watched the portion of the show before Marcus appeared onstage.

As soon as Marcus switches gears in this set to mock vegans, the audience immediately reacts. That’s because actress Jessica Chastain had been teaching Letterman all about her vegan lifestyle. Didn’t stop Marcus. Or you don’t suppose it inspired that portion of his set, do you? Vegan cupcakes, for the win.

By the way, all three of his Late Show appearances on YouTube share the same expression of Marcus for his screengab — arms extended halfway, palms up — what are you going to do, am I right?

Roll the clip!