Daniel pretty much made music wherever he went with whatever was available. At home in West Virginia, he used the family piano. In my garage in Texas where he wrote Yip / Jump music he either brought with him or bought at a garage sale a small "dime store" toy air-organ. That's the same "toy organ" that he made this song with.

The pounding is him "slapping" the keys and "chord buttons" and getting a noise out of the plastic case (which if I remember was badly cracked). For him, I think that's just part of the "noise making" which is "making music".

So - I agree - it is a "pure expression" - making music to make music - not really knowing if anyone else would appreciate it (but hoping they would!).