...before entering dressing rooms in some stores? There is rectangular spot on the wall, let's say 40x40cm, and before entering the dressing rooms with your bag the employee ask you to lean your bag to the spot. After that you can come in. Why is that? Since these are stores where they give you number for no. of items you are carrying, is it that they are checking that you haven't concealed another in the bag, or is it a check for magnets (don't believe so, I mean, you could carry a magnet or tool in your pocket), or somehow checking is your bag of 'special material' ?