no shit huh ? never heard of fingernail clipings. He's kinda an old timers I think more then anything hes tryn to scare me or just repeating what hes been told thats probably bogus. He told me he was tested 3x in 6 months randomly selected and that they pick a like 20 or 30 people each time. I have a hard time believen one company would spend that much on hair testing but I didnt wanna get all into the specifics over the topic and show any signs for concern.