The exercise had me reimagine many ways he had enraged me, bringing all that to the surface. Then it raised any guilt I had around my own actions towards him, sadness around missing him, and finally ending with celebrating what I learned from him. It took just an hour, and I left feeling completely finished, excised of any clinging or craving, and able to effortlessly say "No thanks!" to his next late-night phone call. Pairing words and actions with emotions in a contained and structured time and space, that gives some order to the chaos, might do next to nothing -- but it might help to move through a difficult transition. I was so impressed with this power hour that I went to grad school to study ritual work. Gestalt psychotherapy is a far cry from cultural anthropology, but I perceived a connection to rites of passage that help neophytes transition from one state to another.
I recognize the cringe-factor in all of this, but it's worked for thousands of years to take children into adulthood, and we've kept at it when marrying and burying, so there's likely something useful in the process. And it feels like we need something transformative more than ever.