Once you have completed the wedging process, you will very likely have a whirlpool effect on the butt end of the cone of clay. This is due to the spiral action of the wedging, which is what you want.
You do not want that whirlpool dimple left on the bottom, however. If you were to smack this onto your wheel as it is, you would have an air pocket between the clay and the bat. Firmly smack the clay around the edges of the cone's bottom, rounding the bottom surface and eliminating the dimple. Be certain not to fold the clay over on itself.
