Almost burnt down our house!!

My boyfriend and I were relaxing in bed, he was playing d2. The oven beeped signaling it heated up. I went to go put the pizza in and saw smoke, looked at the oven and it was on fire! My boyfriend tried to smother the fire out, flames dropping and I yelled at him NO and gave him the fire extinguisher. The fire only grew bigger so he used the extinguisher. It sprayed everywhere, the air was white everything around the kitchen was white. I am petrified of fires, once it was out and we made sure than we aired the house and cleaned up. I'm still shooken up. Worst thing that's ever happened to me! 😭 Have you ever put out a fire in your house that could of burnt your entire house down?