Okay, any time you need to use a cheater bar to get a spark plug out, you better cross your fingers... that is NOT good. He broke the porcelin off too (the white part) on one of them and the center metal piece fell into the cyl. On one of the other ones, the metal part actually broke off when he used a cheater bar... the hex part of the threads twisted and sheered right off of the threads in the head. That is why we needed to pull the head and have the rest of the plug extracted at a machine shop.
BE CAREFUL.
