Other activities include paragliding, hang gliding, and tobogganing. It reaches speeds of when gliding and flapping, and about while carrying fish. While flying they rest in short gliding phases. Its flight is a mix of flapping and gliding. Her hobbies include motocross, horse riding, skydiving, hang gliding and snowboarding. Gliders and sailplanes that are used for the sport of gliding have high aerodynamic efficiency. This specialized cartilage is only present in flying squirrels and not other gliding mammals. Furthermore, the transition between gliding and flapping flight is not well-understood. The sugar glider is one of a number of volplane (gliding) possums in Australia. In Australia pollination by flying, gliding and earthbound mammals has been demonstrated. Several hypotheses have attempted to explain the evolution of gliding in flying squirrels. Betilla grants Rayman the power to spin his hair like a helicopter for gliding. An illusion is involved in creating the appearance of the dancer gliding backwards. For example, proteins on the surface of certain bacterial cells aid in their gliding motion. A serpent glissant is gliding horizontally in an undulant posture.