Talking of CFIs...
I was on the radio at an airfield when a call came in from a student pilot on his cross country exam flight who couldn't find us. I tried to direct him to our overhead and thought he might like to land at least for a cuppa to steady his nerves as he seemed a bit shaken up.
The CFI, who was nearby, grabbed the mike from me and proceeded to instruct the student not to land telling him that he had obviously failed his exam and to make his way immediately back to Liverpool where he had started. Arrogant sod.