NEW YORK — Will Smith slapping Chris Rock at the Oscars provoked intense opinions online, especially from comedians who felt it was an assault on their art.

“Let me tell you something, it’s a very bad practice to walk up on stage and physically assault a comedian,” Kathy Griffin wrote on Twitter. “Now we all have to worry about who wants to be the next Will Smith in comedy clubs and theaters.”

The violent exchange began when Rock took verbal aim at Jada Pinkett Smith’s shaved head, saying, “Jada, I love you. ‘G.I. Jane 2,’ can’t wait to see it, all right?” Rock’s reference was made from the 1997 film “G.I. Jane,” starring Demi Moore, who shaved her head to portray a fictional Navy Seal candidate.

Will Smith, her husband, walked onto the stage and took a swing at Rock with an open palm, generating a loud smack. Smith walked back to his seat and shouted for Rock to leave Pinkett Smith alone. Rock replied that he was just making a “G.I. Jane” joke — and Smith yelled back at him a second time.

Smith shouted at Rock to “keep my wife’s name out of your (expletive) mouth,” and the crowd hushed as it became clear this was no act. Smith later won the best actor Oscar; Rock chose not to file a police report.

“Will Smith owes Chris Rock a huge apology. There is no excuse for what he did. He’s lucky Chris is not filing assault charges,” producer, director and actor Rob Reiner commented on Twitter.

George Takei said Smith’s losing his cool was a bad look when so many people were watching: “Many people, especially kids, look up to actors. Because of that, we have an obligation to try to be good role models. With celebrity comes responsibility.”

Pinkett Smith revealed in 2018 that she was diagnosed with alopecia. She has often discussed the challenges of hair loss on Instagram and other social media platforms.

Some commentators noted that alopecia is a painful experience that many Black women go through and should not be joked about. Rock himself helped create the documentary “Good Hair,” exploring why African American women and their relationship to their hair.

However unfunny Rock’s joke was, it paled in comparison to some awards show digs in years past, including from acerbic Ricky Gervais, who has skewered the likes of Leonardo DiCaprio, Judy Dench and Felicity Huffman.

Judd Apatow was highly critical of Smith in a now-deleted Twitter post, describing the attack “out of control rage and violence.” He noted that celebrities have been the target of jokes for decades: “They’ve heard a million jokes about them in the last three decades. They are not freshman in the world of Hollywood and comedy. He lost his mind.”

And Mark Hamill called the incident the ugliest Oscar moment ever, tweeting “Stand-up comics are very adept at handling hecklers. Violent physical assault… not so much.”

Janai Nelson, president and director-counsel of the NAACP Legal Defense and Educational Fund, wrote: “I know we’re all still processing, but the way casual violence was normalized tonight by a collective national audience will have consequences that we can’t even fathom in the moment.”