A Zero-G Roll is a spectacular roller coaster inversion where the train performs a 360-degree barrel roll while simultaneously cresting a hill. The "Zero-G" part of the name comes from the specific physics of the element: the track is designed so that as the train rolls, the upward centrifugal force perfectly balances out the downward force of gravity. This results in the rider experiencing a moment of "weightlessness" (0 Gs) exactly as they are upside down. Unlike other loops or rolls that "push" you into your seat, a well-engineered Zero-G roll makes you feel as if you are floating out of your harness for a split second. This element was popularized by designers like B&M (Bolliger & Mabillard) and is a staple on famous coasters like The Incredible Hulk at Universal or Banshee at Kings Island. In 2026, coaster enthusiasts still consider the Zero-G roll to be one of the most "graceful" and satisfying maneuvers in ride design, as it provides a smooth, "floaty" sensation that contrasts sharply with the high-G "crushing" forces found in standard vertical loops or tight spirals.