For example, chimpanzees have a much shorter thumb than humans, causing a problem with finger-thumb opposition in the "pincer grasp" that we use to pick up and manipulate small objects. With her short thumb, Viki might have found it difficult or impossible to hold or carry objects in the same manner as humans. As we see in this clip, Viki worked around this potential limitation. Note her use of the pincer grasp as she holds the cigarette. Also note how silly it looks for a chimpanzee to smoke. It would look pretty similar on you!