"CODA" became the first movie from a streaming service, Apple TV+ (AAPL.O), to win the film industry's biggest prize.

In a moment that initially looked like one of the gags that enliven the Oscars telecast, Smith strode up to the stage and delivered an open-handed slap to Rock after the presenter made a joke about the actor's wife, Jada Pinkett Smith.

But it swiftly became clear the moment was in fact unscripted when Smith, who had returned to his seat, exchanged words with Rock that included a twice-repeated obscenity, shocking the audience at the Dolby Theatre.

Minutes later, Smith learned he had won best actor. In his acceptance speech, he broke into tears and apologized to his fellow nominees and the Academy of Motion Pictures Arts and Sciences -- but not Rock.

The altercation contrasted with the feel-good moments associated with "CODA." When the movie won Oscars for best picture, best supporting actor and best adapted screenplay, nearly everyone in the audience stood and applauded in sign language.