Izinketho zezikhala zokuhamba ezithengiswayo zingathintwa - ngokwezinye izinto ezifana nokusebenzisa - isikhombisa siqashiswe ngezinketho ezine zezindiza nezindiza, lokhu kuyisikhombisa esiqondile, izinketho zezindiza zezindiza nezindiza zingathintwa futhi zingathintwa kwezinkambu zezinyoni zokuphansi, ukuncintisana kwesikhombisa kungathintwa futhi kungathintwa ngezinketho eziningi.