1. A method comprising the following computer-executable acts: receiving video data, wherein the video data includes a plurality of video frames that comprise an animate object; accessing a data store that comprises data representable by an action graph responsive to receiving the video data, the action graph including a plurality of nodes, representative of a plurality of possible postures of the animate object, and at least one node of the action graph corresponding to multiple actions determinable through use of the action graph; probabilistically identifying a sequence of nodes in the action graph based upon respective postures of the animate object in the plurality of video frames; and determining an action undertaken by the animated object in the plurality of video frames based at least in part upon the probabilistically identifying the sequence of nodes in the action graph.