There’s a common saying that you can’t die from holding your breath, because once you pass out, the autonomic nervous system takes over and you’ll start breathing again.

The inspiration for this question is this video of a guy who apparently almost died from holding his breath too long, and being told to breathe while he was blacked out is what saved his life. People in the comments are praising the rescuers for saving the guy’s life by slapping him and shouting at him to breathe after he passed out from holding his breath, and are acting like had the rescuers not yelled at him to breathe, he surely would’ve died.