Front Air Bag problems of the 2009 Dodge Avenger

While driving a 2009 Dodge Avenger from national car rental (~11,000 miles on the vehicle) at 70 mph on a florida toll way, the airbags deployed. There was no collision or contact with anything (animal, road debris, etc. ), the road was flat and straight, and there were no circumstances or events that would have caused the airbags to deploy. I was talking on a cell phone using a bluetooth headset at the time and had just moved my blackberry, crossing the steering wheel when the airbags deployed. The force of the passenger side bag deploying severely cracked the windshield. The car was driven to national car rental's return at orlando airport.