Duping Delight occurs when a Liar is telling a Lie skillfully and he knows that other people know that he is lying and they appreciate the skill with which he is telling the Lie, according to Paul Ekman who created the new science of Micro-expressions.
This however is beyond the Micro-Expression of duping delight. I don’t know if Dr. Ekman has discovered the Micro-expressions of Sadistic Personality Disorder but I am pretty sure that I see them here. He attempts to thwart a smile, but you see a positively gleeful look in an intense Duchenne smile. It is almost as though he is getting sexual satisfaction from telling this lie. Like he is a 6 year old boy who urinated in his closet for a month and now he is blaming it on the dog.