I've been sectioned once and threatened-into-voluntary-admission twice. The section was after I did a suicide attempt that landed me into the hospital and then did 3 suicide attempts within an hour of waking up. Thing was, I was very serene. I was convinced I was almost dead (= I was convinced I was about to succeed in killing myself) and that made me SO calm and happy. My suffering was near its end. For the first time in years, I wasn't afraid anymore. The end was in sight. This all was such a relief that the depression went away entirely.
Everyone was 'a little' disturbed by it and honestly, I couldn't blame my pdoc for having me sectioned.
I continued the suicide attempts during the section and, as they failed, my conviction that I was about to die lessened, and the depression returned.

By the way - I had a crap lawyer. She literally said (well, not in English, but in my home country's language) "Breadfish wants to go home, but it's clear to me that she should stay here." WTF? You're supposed to be on MY side!