I mean the entire history of the world. I've narrowed it down to "That dumbfuck Bobo pretending to believe the world is ending" and "That dumbfuck Sal pretending to cry while he pretends to believe Howard is retiring while the entire staff pretends to believe they are pranking him". There are many other awful, ongoing fake bits over the years (John pretending to stutter, Sal pretending to be stupid, Howard pretending to not wear a wig, Beth pretending to be a model, ect.) but these two are the cream of the crop....the biggest turds in a pile of shit. I've determined this after 26 years of sort of listening to the show. Which is the worst of the worst....? Bobo.... Sal..... I honestly have to go with Sal's revolting, cringe inducing, asshole puckering, douche chilling, Oscar losing performance as the worst moment in the history of the show....and everything else.