on ground. See video. leap up Jump upward suddenly from sitting to grasp overhead branch or hanging playmate. Done by infant without anything overhead as solo play. Cf. leap up in surprise. 7. See video. leap up in surprise While standing bipedal, may leap up when surprised. Category 38. See video. leave Travel away from another with no parting signals. Plooijs LVE. Cf. depart. See video. leave and climb 113 leave and climb Infant leaves mothers back and climbs tree. 3. See video. leave to protest Weanling protests to mother by leaving and keeping distance from her, usually with whimper or whimper-scream. See also monitor mother. Cf. fall over backward. See video. leg cradle See cradle with leg. leopard See respond to leopard. lever open Whiten et al.