WHILE DRIVING THE 2012 HYUNDAI SANTA FE TO TENNESSEE FROM ATLANTA, WITH MY WIFE AND DAUGHTER AS PASSENGERS, I FELT A HEAVY BUMP ON THE INTERSTATE, AND WONDERED IF A TIRE HAD GONE FLAT. SHORTLY AFTER THIS, I SAW HEAVY SMOKE IN MY REARVIEW MIRROR, LETTING ME KNOW THAT THERE WAS A PROBLEM WITH MY CAR. A PERSON DRIVING IN A LANE TO MY LEFT TOLD ME THE CAR WAS ON FIRE, SO I PULLED OVER IMMEDIATELY. I GOT MY WIFE AND DAUGHTER OUT OF THE CAR, AND WALKED THEM TO A SAFE DISTANCE ABOUT 150 FEET FROM THE CAR. I HAD THE CAR TOWED TO A REPAIR SHOP. THE MECHANIC TOLD ME THAT A PISTON (OR PISTONS) HAD BLOWN THROUGH THE BOTTOM OF THE ENGINE, AND I WOULD NEED TO REPLACE THE ENTIRE ENGINE. IT WAS TOWED BACK TO MY HOUSE, AND WILL NO LONGER START. THIS WAS THE FINAL FRIDAY IN APRIL 2018. THE VEHICLE WAS IN MOTION, AT A SPEED NEAR 60 MPH, ON I-75 NORTH FROM ATLANTA, DRIVING STRAIGHT AHEAD.