A year ago, Dave Chappelle was heckled off the stage in Hartford, Connecticut, during his Oddball Comedy & Curiosity Festival tour. (Soon after, he called a Chicago audience "young, White alcoholics" and joked that he hoped a nuclear bomb fell on the city.) But on Saturday night, after finishing up his own set in Hartford, Louis C.K. announced that Chappelle would come out for a surprise performance. After last year's incident, some of the audience members thought it was a joke, but — lo! — Chappelle appeared to raucous applause, prompting him to say, "This city is schizophrenic."