Nothing more scary than looking over and seeing your instructors hands are no where near the controls
Haha,
A long time ago, with very little tail wheel time, I asked a very experienced pilot I knew, with a PA-18, if I could fly a few circuits with him, to improve my tailwheel skills. "Sure" he said, "let's go". I asked if he wanted me in the front seat, or back. He thought for a moment, and said the front, so in I got.
After a I flew few adequate circuits, I shut down, and we got out. It was then that I noticed that he had no controls in the back!