I recall Tesla Full Self-Driving (Supervised) being engaged throughout the trip. While negotiating the curved highway interchange, I experienced an unexpected, sharp steering movement toward the concrete roadway barrier that I did not intend. The vehicle collided with the barrier, multiple airbags deployed, and the vehicle sustained extensive damage, including apparent steering/suspension damage. The vehicle was rendered undrivable. I obtained the dashcam footage and Tesla's vehicle data export. The available records show self-driving features marked "Available" and "Unavailable" in the seconds preceding collision detection, with cruise control recorded as "Standby." A lane-departure/take-control warning was also recorded shortly before impact. These records raise questions about whether FSD unexpectedly disengaged, whether automated steering contributed to the vehicle's movement, and whether adequate warning was provided.