Will Smith slapped Chris Rock at the Academy Awards after the comedian made a joke about a possible "G.I. Jane" sequel directed at Jada Pinkett Smith's bald head.

The moment, which left audiences puzzled as to what happened, occurred just before Smith won an Oscar for best actor.

Smith had at first seemed to laugh, while his wife, who has talked about her struggle with hair loss from alopecia, rolled her eyes and looked upset.

Rock continued speaking before presenting the award for best documentary feature, as Smith got out of his seat, walked up to Rock and slapped him.

The Oscars audience, both in the theater and at home, at first was perplexed. Was that slap staged, or was Smith actually that angry with the comedian?

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At first watch on TV, the slap looked and sounded to be fake. But the shock from the audience in Hollywood's Dolby Theater was palpable.

Smith continued: "I want to apologize to the Academy, I want to apologize to my fellow nominees. … Art imitates life. I look like the crazy father, just like they said about Richard Williams. But love will make you do crazy things."