Most people you remember not only by their face but by their whole body appearance. They are small or tall, fat or skinny, they have gestures or don't have gestures. They have a body language that you remember.
With Greger this is not at all the case. He has a facial expression you will never forget and that speaks more than words. After meeting with him you will not remember if he was small or tall, what color his hair was. You just remeber his face as if you just had met a mask.
