For those unaware, Chris’s joke referred to Jada’s shaved head. In 2018, the 50-year-old actress opened up about her alopecia diagnosis on her talk show, Red Table Talk; she spoke about her “issues with hair loss,” explaining, “It was terrifying when it first started. I was in the shower one day and had just handfuls of hair in my hands, and I was just like, ‘Oh my god, am I going bald?'”

Source: https://www.distractify.com/p/what-did-chris-rock-say-about-jada-smith