Rock explained that the feud between him and the “King Richard” star and wife Jada Pinkett Smith began when he made a joke at both their expense as the host of the 2016 Oscars, which the Smiths boycotted because Will hadn’t been nominated for the sports drama “Concussion.” Except that Rock accidentally named Smith’s most recent film, the slavery biopic “Emancipation,” instead.“Years ago, his wife said I should quit the Oscars; I shouldn’t host ’cause her man didn’t get nominated for ‘Emancipation,’ the biggest piece of s— ever!” Rock told his live audience, before realizing his mistake. “No, not ‘Emancipation,’ I f—d up the joke.”Rock then went on to deliver the joke the way he’d intended: “She started this s—t.