This lesson we learnt how to animate an arm swing in 3D using Maya. First making the basic shape of an to with its 3 sperate components (Bicep, Forearm, Hand). Moving the pivot points to the start of the joints. Parenting the assets so they interact with each other as if they were attached in real life. Shifting the flow of in the graph editor can give a delay effect similar to how a real arm would swing.
This knowledge is applicable to both 3D and 2D. The principles of what we learnt apply to both. An arm swing is a huge part of any animation that consists of anything walking and with arms.