In Star Wars there's supposedly always a significant chance that the carbonite freezing process will kill a person but it never seems to happen. In Dragon Ball using the kaioken is said to be dangerous and potentially fatal but besides that one time that Goku lost control of his energy from overdoing the kaioken it's never really hurt him even though it supposedly could make him explode. In One Piece Luffy has done all sorts of reckless things to his body and even when he has a 1/100 chance of surviving a poison or is minutes away from destroying his heart with gear second he recovers just fine.
I could find other examples but you get the idea. There's something in fiction that supposedly has a significant chance of killing the hero but they make it out okay or they're said to have a very tiny chance of survival but surprise, they live.
Has this ever been subverted? Has anyone in anime ever used something like the kaioken and then they actually die like the story said they could? Has there ever been a character that took a pill that could either kill theme or make them stronger and it didn't end well for them?
I just don't like the fake tension this trope creates.