Actually what you need to do is an old 3D animation trick. To be clear, you are talking about a sophisticated 3d move. Let's assume a 3 phase motion: [1] A runs at B, [2] A grabs and throws B, [3] B flies through air and lands. You will need 3 "B" chacters that appear and hide at critical moments during interaction with "A". At the moment [1] and [2] connect, you duplicated "B". The the very next frame you hide the original "B" and parent the second "B" to the hands of "A". This way "B" will track "A"s motion. At the moment of release between [2] and [3] you again duplicate "B" hiding "B #2" and un-parenting "B" #3 so it flies and lands with it's own animation and IK. Sounds more complex than it is. It's really fast to do. Mark