This is a unique thing. The person is acting as if he is actually holding the face skin. However, the carving has been done in a fashion that imparts the look that you're getting here. Other than that, just look at the detailing the artist has given to this pumpkin. The eyes, nose and even the lips are so realistic that one can't believe easily that this is not a computer generated image but a real carving. Some artists go way beyond our imagination and the output is what you are seeing here. It is amazing in every sense.