Okay, here is a real, and stupid move I did when a young flight instructor.... I just got a call from the guy involved, which made me remember it...
I was working in fire and doing part time flight instruction in the west, and had an old friend come to visit from the east coast. He had his private license, and was a real conscientious pilot, but didn't fly all that much. He was dying to go flying "in the mountains", and we agreed we'd fly to a few medium-sized airports, and if he felt "brushed up", we'd go to a few grass strips.
We had a great time, and he was doing a really good job. He was nailing things in the airplane (a new C-152), and we were having a blast.
Well, in hindsight, I should not have let my guard down as much as I did, because we went to a few grass strips, and he did a good job. (Don't relax!) So, I decided we'd go to a shorter grass trip near town, that had a slight slope to it (one way in, one way out). (Don't relax!) He was a bit more puckered up, but I thought that just meant he had a brain. It turns out that the addition of tall trees (Don't relax!) was something that made me him truly nervous.... (which I should have thought of..) and he let his airspeed get higher than it should have been on final.
I should have taken the airplane sooner, but since he had been doing everything so well, I TOLD him what to do, to get us down NOW, before it would be impossible. (Don't relax!) I fully expected him to do what I said, and make the corrections, etc. (Don't relax!) Well, either he didn't hear a WORD, or else he heard it but FEAR was way stronger, because he didn't correct a darned thing, and we ended up way too high on short final. Then he abruptly chopped the power, realizing (too late) we were way too high.
Well, now things are getting REAL interesting, because we're sinking like a bowling ball, and I'm taking the airplane from him, and telling him as much. I announced we were going around. Well, thank goodness for healthy cylinders and a good little airplane, because we wallowed out in a stuggling climb over those same TALL TREES that were indelibly imprinted on his eyeballs, and mine. (Don't relax!) Man was she ever pegged on best angle speed!
We squeaked through the timber and headed back to the big airport. His eyes were huge, and he said in shock "There were so many trees!" That was the first real inkling I had that
I had failed to even warn him of what the sight picture would involve.... I had NOT told him fully what to expect, and I had let my guard down because he did such a good job in the airplane.
It taught me to try HARD to see every flight from the eyes of the person I was with... and I learned a little bit better, Don't relax!