Following the OGR I needed to come up with a shorter story that incorporated the windmill element more, this is just a rough first idea since then.
A woman is dancing on stage with her ballet partner who keeps forgetting his routine, afterwards she is walking backstage and hears a repetitive banging noise coming from the basement and goes to see what it is. Upon finding a no entry door from which the noise is coming, she peers through a gap to see a large man pick up a bowling ball and walking over to a large wheel connected to a spinning pole reaching up through the ceiling, when he then goes to throw the ball at the wheel too keep it turning she notices he naturally pulls a ballet pose to throw, and carries on doing this while pulling different poses each time. After a while he notices the woman watching him and is startled and embarrassed, she dances over to him and pulls him to dance with her, with him naturally being able to dance. The two of them then become ballet partners, while her old partner is sent to the depths of the basement keep the windmill spinning in his place.