When a good guy becomes a bad guy. One of the most powerful storytelling tools in wrestling. Done right, a heel turn can revitalize a stale character overnight. Hogan joining the nWo. Seth Rollins breaking up The Shield. The best heel turns feel inevitable in hindsight but shocking in the moment. A face turn is the reverse — the villain finds their conscience.
"Nobody saw the heel turn coming. He hit his best friend with a steel chair and walked out without looking back."