In non defence of Chris Rock, the so called Hollywood "funny" man...
1. The joke wasn't even funny. The reference was about as dated as Chris Rock himself. He may as well have said "Yo Will Smith. Your wife got a baldy slap head."
2. Despite being ubiquitously precursored as "Hollywood funny man" he just stood there like a chump as the seconds passed before coming out with some lame garbage. A real funny man, someone sharp / switched on would have hit back instantly with a great line. Rock had nothing.
3. He took a slapping from another man. In public. And just stood there.