general problems of the 2000 Ford Expedition

It was Saturday morning and I was taking my daughter shopping for some school clothes, driving down ell t grasso blvd going to look for the interstate 95 driving 20 mph I hear this loud pop and my daughter screams and smoke comes out of the hood, and this loud noise from the engine I had no other choice but to pull over in heavy traffic open the hood and see my spark plug out of the engine never seen this happen before I was stuck there for about 3 hours until family members came and help this is my 2nd Ford Expedition but after reading this is a common problem I will never by another Ford again, I just think and wonder what would had happen if I was in the interstate 95 doing 55mph I probably wouldn't be writing this right, now thank god my daughter and me never made it to the interstate 95.