When I was a teenaged photo rat (long long ago), I knew Mr. A. B. Miller, a crusty former photographer for The Jackson (MS) Daily News. He told me of shooting one of the many delta floods with a 5x7 Graflex SLR. The part I remember most was: "The only @$%$$%^ thing I liked about that *^^$$%^$## was you could fold it up and sit on it."