What metaphors are used in A Circle in the Fire by Flannery O'Connor?

Mrs. Hopewell and her daughter contribute to their own defeats by their constant assertions about social hierarchy. Mrs. Hopewell opens the door to calamity by enthusiastically defending her opinion of the relative worth of "good country people", and both mother and daughter are equally duped by Manley Pointer, the travelling Bible salesman, who metaphorically keeps his foot in Mrs. Hopewell's door by claiming that Mrs. Hopewell is the type of person who doesn't "like to foot with country people like me!," relying upon Mrs. Hopewell's condescending denial.