in a shop I ran once for a courier service. we had a disgruntled mechanic. I had to discipline him, this made him even more disgruntled. so then he did a front brake job on one of our Ford vans. the van went out the next morning and when it came back in the afternoon the driver complained that the van would pull when the brakes were applied. so we pulled it in and pulled the front wheels, one of the rotors looked exactly like that one. we pulled the caliper and the outside pad was installed backward, metal to metal. several things amazed me about this. first the mechanic who installed the pad backward was a competent mechanic but let his anger affect his work. needless to say I fired him. then the driver who drove this van all day. I asked him didn't you notice anything unusual, he said yeah it didn't stop good and made a terrible noise when the brakes were applied. I said well why didn't you come back and say something, he said he thought it was normal, he wasn't an experienced with vehicles. overall a pretty unbelievable situation. highdesertranger