motor vehicles is living out an occupational hazard nightmare. 34-year-old robert keller pulls up to park after completing his road test. he goes to hit the brake, but instead hits the gas pedal. the car races forward, smashing through the glass as it enters the building. people inside the dmv scatter and two suffer minor injuries. ultimately, keller's okay. so is the dmv employee in the car with him. keller did, however, fail his driver's test. coming up, a real yo-yo. >> everybody in the studio was just looking at each other like, what just happened? >> and later, a state trooper takes a terrible tumble. when "caught on camera: occupational hazard" continues.