The TVTropes Trope Finder is where you can come to ask questions like "Do we have this one?" and "What's the trope about...?" Trying to rediscover a long lost show or other medium but need a little help? Head to Media Finder and try your luck there. Want to propose a new trope? You should be over at the Trope Launch Pad.
Could be. It's more like the medium and everyone involved treat what looks like a lethal situation as no big deal — as if 'getting captured' is the worst that can happen to you, and when someone disappears they will always turn up later, maybe tied up but not hurt. Non-Lethal K.O. applied to other media.
Here's what brought it to my mind. At the :24 mark in this video
, Namor the Sub-Mariner falls into a burning pool of alcohol (he'd thought it was water, improbably) and disappears into the flames. No one acts like they'd witnessed a death... and in fact Namor is perfectly fine later.
Same video, 2:30 mark, Captain America sinks into a pool of quicksand. No one even tries to go in after him — they just fly off and leave him to what the viewer would assume is a miserable death. Sure enough, before the episode is over, he's fine. He's just been captured and imprisoned by the villain of the day.
It doesn't help that both incidents look like deaths, and pretty nasty ones too.
Edited by CharisetThat sounds a bit like the above crossed with a form of Functional Genre Savvy. I remember seeing something similar on here the other day, and that's what they concluded it was.
It's not Disney Death because that's treated as a death in-universe. This isn't.
I agree that Nobody Can Die seems closest. It was just jarring.
Like I said, Functional Genre Savvy (character's assumptions about their situation relate to their genre) for Nobody Can Die. No one worries about either character because they "know" that they're in no real danger of death.
Edited by nrjxll

Is there a step-sister trope to No One Could Survive That! where a character falls into fire/quicksand, etc. but is merely 'captured' and shows up unhurt later? It's something of a Saturday morning cartoon thing, where characters and viewers alike can safely assume that no one ever actually dies.
Not the same thing as an anime dub or edit that spares a character who died in the original or retcons his death.
Edited by Chariset