These ponderings attempt to let themselves be appropriated by the event. (Beiträge zur Philosophie (Vom Ereignis), Martin Heidegger, 1936–38/1989)
https://www.verywellmind.com/zeigarnik-effect-memory-overview-4175150
See also
https://www.simplypsychology.org/zeigarnik-effect.html
https://en.wikipedia.org/wiki/Zeigarnik_effect
Now, this must have something to do with objet a.