hehehe. Once in a while when I'm shooting someone with the 4x5 -- and they know I shoot in B&W -- we switch positions and I let them see me under the darkcloth on the ground glass. Comments I've gotten: "Oh, it's digital!", or "Hey, this is in colour. You said it was black and white!", "Why is the camera upside down?", to which I sometimes tell them that they have to stand on their head.