A car traveling too fast on a dark private road missed a curve and tumbled down a steep embankment late Thursday night in Victorville. The crash occurred around 11:00 PM near C Street and Kemper Campbell Ranch Road. The male driver had to be extricated from the vehicle and was flown to a trauma center for treatment. The female passenger also sustained serious injuries and was taken to a hospital by ground ambulance. SBSO VIctorville and SBCo/Victorville Fire responded.