The video in this post is used to demonstrate the concept of the human body behaving as one large connected piece, as opposed to behaving as a group of separate pieces acting together.
In the video, Goku’s opponent is a large bat man type creature.
He is human with wings and horns on his head. Goku knocks him off of a platform so that the creature is going to fall into a pit of acid.
The creature wakes up before he hits bottom, and flies back up to the platform.
The way the devil’s body moves as he flies back up to the ledge is how a human body that behaves as one piece would move. The movement of his arms and legs back in towards his body is what is being referred to.
Depending on your perception, you might see the independent and separated arms and legs pulling back towards his torso, or you might see a one big connected piece human body that is retracting it’s arms and legs back into itself from a point approximately in the center of the back.
If you see the arms and legs as separate independent objects moving back towards the torso, try re-watching the video on a regular basis until you train yourself to see the body moving as one big piece.
The bat creature described above has a special power. It can change the negative thoughts that a person has into energy with which to blast the opponent.
When you watch the following video clip, listen closely to everything the devil says up until he says “then I convert it into an energy blast”. Everything the devil says up to that point is true in real life.
At the end of the video, Master Roshi shouts “Goku! Get out of there! He is going to use your thoughts to destroy you!”.
This is true in real life. It is a legitimate tactic to use your opponents thoughts against him in Kung Fu. Actually, this is a high level technique way above learning to punch and kick people.