Much like it sounds, after 2nd flip each subsequent flip lands in a new location away from your starting point. This could also be set on contour or between production rows. Allowing the stack to set over soil for a day between flips benefits to soil biology and leaves behind a thin layer of nutrient to the existing topsoil that temporarily shares soil biology. If applied between fruit trees during dormancy you get a better boost for your trees in the next fruiting season.