From a coasting position in an underground garage, i turned right to round a 90 degree corner. after completing the turn my car began to speed up rapidly. when i first noticed the acceleration beginning, i stepped on the brake, which had no effect. the car continued to accelerate over a distance of about 50 feet and collided head-on with a concrete wall. front airbags on the driver's side deployed and my body struck them: face, chest, and lower legs. i have injuries from the incident.