Examiners,in my experience, do their best to put the student at ease.
Reminds me of my examiner - great chap. I told him I intended to treat him as I would my next door neighbours wife, who had never flown in a small aircraft, and that I would be explaining everything I would be doing. "Great" he said, "has she got big t**ts?"
Greatly relaxed me, top bloke (A300 driver), so sadly killed in a road accident shortly afterwards