The vehicle hit a patch of ice at about 55mph, spun out, and left the road. It rolled onto its right side (a total roll rotation of 90 degrees), and the side airbags deployed at some point during the roll. When the front passenger-side airbag deployed from above the side window, it pinned the passenger's head to the window, causing significant bruising and a possible mild concussion. The real danger, though, was if there had been some projectile or debris that impacted the window while the passenger's head was trapped against it. The way the airbag deployed actually exposed the passenger to much more danger, and caused more more injury, than if it had not deployed at all. The passenger was awake and upright in her seat at the time of the incident. A county sheriff reported to the scene, and the vehicle was towed to a lot. The vehicle is otherwise untouched and available for inspection. No inspection of any kind has taken place yet (the officer at the scene did not examine the vehicle at all, and insurance has not seen the vehicle yet). There were no symptoms of the problem prior to the incident. The only warning light that was on was for a malfunctioning TPMS system, but the tires were confirmed to be at correct pressure by external gauge.