both airbags deployed at 5 miles per hour.and burned by leg

I rented a Jeep Renegade at BWI airport on 07/13/16 and involved in a minor accident. The traffic was at a snail's pace and I tapped the vehicle in front of me going approximately 5 to 7 mph and both airbags deployed and burned my leg, stomach and breast. The police and ambulance arrived and neither could understand due to the slow traffic why both airbags deployed. Please help me.