I HAD LEFT MY LIGHTS ON AND BATTERY WENT DEAD. WENT TO JUMP THE VEHICLE AND CHARGE THE BATTERY. CABLES CONNECTED CORRECTLY. WHEN I WENT TO START THE VEHICLE, I HEARD A LOUD EXPLOSION NOISE LIKE A BACK FIRE BUT SAW A FLAME THEN SMOKE OUT OF ENGINE. THE ENGINE HOOD WAS CLOSED SINCE THE BATTERY IS LOCATED UNDER THE BACK SEAT OR THIS COULD HAVE BEEN FATAL OR A SERIOUS INJURY. THE FLAME MUST HAVE BEEN EXTINGUISHED BY THE FLUIDS? WHEN WE OPENED THE HOOD AFTER A SHORT PERIOD, WE FOUND THAT THEIR WAS SOME TYPE OF EXPLOSION IN THE ENGINE. THE VEHICLE WAS STATIONARY AND IN MY DRIVEWAY