On Monday night's Last Word on MSNBC, Lawrence O'Donnell paid tribute to legendary director Sidney Lumet, who died in April and was memorialized at Lincoln Center on Monday afternoon. He did it by playing clips from some of Lumet's most memorable movies, but when the tribute got to a scene of Philip Seymour Hoffman from Before the Devil Knows You're Dead, the audience was treated to an unedited F-bomb—and a good one at that! Video of the entertaining oversight is above. [via Business Insider]