Jokes are the way to create fun and one shouldn't mind. In the start, Will Smith was also laughing but in a moment when he reacted overly. I know this was a personal joke, one's illness shouldn't be included in a comedy. But if this happened it wasn't the right act and place to slap someone. Chris Rock controlled everything nicely. Just imagine everyone starts slapping comedians for this. To be honest I was sad after this.
Yeah, I forgot to talk about how well Rock handled the whole thing. I actually wonder if Will Smith would have stood up and done the same if someone like The Rock or Hardy or anyone who could fight back was on stage instead of Chris Rock.