WHILE DRIVING THE VAN BETWEEN 20-25 MPH, GOING AROUND A CURB, DRIVER SLIGHTLY TAPPED THE BRAKE PEDAL, RELEASED THE PEDAL AND TAPPED THE BRAKE PEDAL AGAIN. AT THAT TIME, THE AIR BAG ON THE DRIVER'S SIDE DEPLOYED FOR NO APPARENT REASON. THE DEPLOYMENT CAUSED THE DRIVER TO CRASH INTO A MAILBOX. THE AIR BAG IS BEING REPLACED. *AK