"Good Hair" is an insightful and entertaining, yet remarkably serious, documentary about African-American hair culture. An exposé of comic proportions that only Chris Rock could pull off, "Good Hair" visits hair salons and styling battles, scientific laboratories, and Indian temples to explore the way black hairstyles impact the activities, pocketbooks, sexual relationships and self-esteem of black people. What Rock discovers is that black hair is a big business that doesn't always benefit the black community.