Not quite true that you may never see it. In the 70s a PA28-180 was put into a spin with four people on board by the front seat passenger. The pilot was unable to recover until a rear seated instructor intervened, they were however so close to the ground that in the ensuing massive attempt to then stop it hitting the ground the wings were overstressed VISIBLY(wrinkling). The front seat passenger was later prosecuted in the local magistrates court and the aircraft received two new wings and is still flying today!