Arboreal locomotion small branches, as they may wrap too far around and prick the animal's own paw. Adhesion is an alternative to claws, which works best on smooth surfaces. Wet adhesion is common in tree frogs and arboreal salamanders, and functions either by suction or by capillary adhesion. Dry adhesion is best typified by the specialized toes of geckos, which use van der Waals forces to adhere to many substrates, even glass. Frictional gripping is used by primates, relying upon hairless fingertips. Squeezing the branch between the fingertips generates a frictional force that holds the animal's hand to the branch. However, this
Animals in sport Films and television series about animals in sport can be realistic or fictional, involving animals in an activity that they cannot really perform. "Seabiscuit" is a fairly accurate portrayal of the famous American horse of the same name, while "", a film about a hockey-playing chimpanzee, is unrealistic. The 1980 animated film "Animalympics" is a spoof of the Olympic Games and features anthropomorphicised animals. In the combination live action and animation film "Bedknobs and Broomsticks", animated animals play a game of football. Similarly, several television commercials used the Budweiser Clydesdales and other animals in live-action and CGA roles to appear