Of course, a movie is in constant flux.

Musicals are famous for being in a constant state of flux.

Why not a space flower? Why do we always expect metal ships?

What emerged, of course, was that the magnitude scale presupposed that all earthquakes were alike except for a constant scaling factor. And this proved to be closer to the truth than we expected.

Things of this world are in so constant a flux, that nothing remains long in the same state.

The constant flux and caprice of mental events do not admit of the establishment of stable experimental conditions.