Grumbler, that was a REALLY good guess! I believe the adjective you're looking for is DEATH-DEFYING act of heroism (-or- [second choice] heroic act)

Does "defying" not imply that the person (possibly) remained alive?
предсмертный means that he definitely died after the act.

So does “near-death” - it means that he came near dying, but didn’t. That’s what I was going by. If he died, I would say “final act of heroism”

https://www.snopes.com/fact-check/emmanuel-mensahs-final-act-heroism/

Thanks. I deleted mine. Add the correct one.

Isn't it too complicated? Maybe "feat before death"?

hahahahaha of course, if the actual phrase we use is too complicated, use your own 🤯

I’m just trying to find the right phrase. ✌🏻I should translate a name of the picture, I was thinking as you. Thank you for your help. Now I'm just asking what do you guys think of the translation "feat before death".. ✌🏻✌🏻✌🏻

AL, ну я же вам говорил, как проверять догадки. Ваш ngram НИЧЕГО не подтверждает - https://www.google.com/search?q=%22death+deed%22&ie=utf-8&oe=utf-8&client=firefox-b

I gave you the right phrase – in fact two

DEATH DEED??? I’ve seen everything! 😂🤭🤣

Great thanks 😓