Many years ago, when I was in my early 20s, I was sitting on a beach near Westbourne, Bournemouth with my late partner, when an elderly lady in a heavy astrakhan coat and handbag strode purposefully into the sea up to her waist and leaned backwards until her head went under. It was off season and there were no life guards on this part of the beach and very few other people.
My partner, who did not swim and was short and very slightly built waded into the waves fully clothed and was able to drag her back to the shore. No mobile phones in those days so someone ran to a beach cafe while we stayed with her and phoned for police and ambulance and she was taken into hospital. I don't recall how we got home. It was cold and he was soaked to the skin in his office jacket and trousers and his only pair of shoes were ruined. Possibly a police car dropped us home (it was nearly 50 years ago).
My late partner contacted the police a few days later to ask if the lady was OK. He was told that she was and that the family had told the police that she had wandered off and this was her second attempt at drowning herself in the sea.
Evidently, the family had left no message with the police to pass on their thanks for pulling their elderly relative out of the water.
For some time afterwards, I had flashbacks of this lady striding into the water, leaning backwards and going under and I did feel a bit miffed at the time that her family had not found a way to pass on their thanks. (But I'd probably feel differently now, should I find myself in a similar situation.)
We pondered about this incident a lot afterwards and wondered what her personal circumstances might have been and whether she would have been relieved to have been rescued or distressed that her decision to end her life (a decision she had apparently made at least once before) had been thwarted.