[jdrov]

Admittedly, if you asked me 20 years ago which one of "time crystal" or "flux capacitor" were actually from a movie called "Back to the Future," I am not confident I would answer correctly.

[reificator]

I hope that's because you were too young to have seen the movie, because 20 years ago was 1998.

Back to the Future was 1985. (And 1989/1990)

[smarks]

If a time crystal could somehow be manipulated to change the moment of inertia, that might be called an oscillation overthruster.