Don Rickles is an old school comedian who made a name for himself back in the days when Johnny Carson and David Letterman were the late night TV hosts du jour. He was known as an insult comedian of the finest order, who’s also had a number of dramatic roles over his career, and although he’s getting up a bit in the years now, an appearance he made the other night on Jimmy Fallon shows that the man has certainly still got it. He has some great stuff for Fallon, and even has some good lines for QuestLove as well. Check it out below.