I've had this happen more than once. I got a random after going through the metal detector at ATL today, get directed over to the scanner. As I start to walk over, she says "do you have anything in your pockets?", and I say, "yeah, I've got a ton of stuff in my pockets." (Wallet, credit cards, chapstick, mints, handkerchief). Of course I had to take everything out...but she acted like completely shocked, as though I should not have had anything. What am I missing here...the precheck rules are, you go through metal detector, so just remove metal objects. I don't understand why they always seem so surprised when people have stuff in their pockets.