As we were driving on the highway about 70 miles per hour, no traffic relatively, the vehicle started to violently shake and then we heard a loud explosion in the front end, prompting the front drive and passenger airbags to deploy, as well as the full right side curtain airbags. This curtain airbag struck my wife in the head and prompted her apple watch to call 911. we initally thought we popped a tire or ran over something but no damaged at all visible to the car. even the state trooper was baffled by the situation as emergency personnel arrived. the car was not driven home so when the tow facility assessed the vehicle even he was baffled and assumed perhaps the explosion happened in the front end inside the cvt transmission. the officer on site stated this couldve ended horribly with us going the normal speed on the highway but somehow we were guided safely to the side of the road.