Dave Chappelle says he didn't just up and leave Chappelle’s Show in the early 2000s. "Technically, I never quit. I'm seven years late for work," he joked on The Late Show with David Letterman during his first late-night appearance in over six years. Still, no regrets here for the veteran funny man. "I made a series of decisions," he said. "Look, Dave, it's very hard to go through something like this because no one has really done it before. So there's not too many people that don't think I'm crazy." He also promo'd his forthcoming nine-date gig at Radio Music City Hall, set to include The Roots, Jill Scott and Nas. Watch Dave take on Dave above.