I was asked to sit in on a 'get acquainted' ride where an older student with 106 hours had not yet been signed off for solo flight and thought he was being robbed so he was shopping for a new instructor. So I was in the back seat of the 172.
He taxied fine, managed the take off (a bit abrupt on the rotation), and flew the airplane reasonably (noticeable wandering of heading and altitude) Stalls and turns about a point were bad. Flying under the hood lasted about ten seconds and we were starting into the old death spiral, When the CFI told him "take us back to the airport" he could not find it until pointed out to him, then he proceeded to blast across a busy pattern (at pattern altitude) cutting off two planes, made radio announcements of position that were totally wrong, and landed on the cross wind runway (much chirping, hopping, and shuddering from an unhappy airplane).
The CFI told him there was nothing he could do the help him.