So apparently this is a good Example of how Glen Keane was using animation test for the Disney character Tarzan, then doing the rough drawings for the actual film to catch Tarzan's character. I Think the reason this is a good idea for Glene to do test before animationg him in the final film, because if not done these, we might would head less of an idea to capture Tarzan's mannerisms, and personality making the animation not as well as we see here.
I thought Glen Keane dos a pretty nice job in this video. And it's certainly inspiring for other 2D hand drawn animators to know what they should do. If 2D hand drawing animation can still exist....
