A driving force

...and I appreciate your comment too, my dear Emi, I think they are the perfect answers to my sometimes bizarre questions.

Thank you Daniela for the comment...I don't know what the force is and where it goes either...
I usually don't think any concept while I make painting/drawing. This title came from the impression I had on the drawing when I finished the work that something wheel or motor like thing moving noisily.

This is a beautiful, very beautiful drawing, but the questions are: what is this force and where does it go?