A great example of this is in Maurice Ravel’s String Quartet in F Major, right at the beginning of the second movement (which starts at 7:41 in the below video). In the second measure, the second violin and viola continue their eighth-note pattern grouped in threes, while the first violin plays descending quarter notes, essentially groups of two eighth notes.
The theremin and sci-fi are like two peas in a pod. Once the instrument became available to purchase, build, and learn on a somewhat wider scale, it was only a matter of time before it became the sound of the unknown in the world of sci-fi film scores. It sounds like a voice echoing out through space, like warbly electronic transmissions signaling an alien presence. Hermmann’s creative use of the instrument in this iconic score would go on to influence not only contemporary film composers like Danny Elfman, but also set the precedent for an entire genre of film which would blend score and sound design into one eery whole.