I think the chances of someone choking on their own vomit during a dmt trip might be quite low to none. There's a self preservation mechanism at play with nausea, I'm sure most people know what it's like to wake up from sleep in the night, realise they're feeling sick and go puke in 30 seconds or less. I've had mild food poisoning and know this to be the case. Of course it's utterly different if you've passed out drunk and nothing can rouse you then yes you may choke on your own vomit
With dmt there's still some sense of awareness and I believe the dmt will take care of you. I really don't think it's like being wasted on alcohol or heroin whereby once you're out you're really out.
I also suspect that if someone is going to purge it'll happen long before hyperspace, maybe it depends how quickly you get there but if nausea hits me it doesn't take long.
I threw up on dmt once but I blame that on eating cheese and crackers too soon before the trip. If I hadn't eaten so soon before then the nausea would have just been nausea.
The first time I felt nauseaous I went and laid on my bed then had the sense to turn onto my side as I'm no stranger to first aid principles. Decided relax, monitor my experience and enjoy the oev and cev for what it was w/o pushing myself further.
I wasn't breaking through here, I was still finding my feet with what it feels like to use this stuff and I think it's vital to take a common sense approach and not throw yourself in at the deep end of an unknown you're not used to no matter what anybody tells you to take. I've had people tell me to take as much as I can and go for it. I find that kinda irresponsible now I've done as much as I have.
If anyone is concerned about vomit then don't eat for 90 minutes at least before tripping, maybe more. Don't just blindly toke more and more with the aim of breaking through, be aware of the effects already in place before escalating. Sitter or no sitter you are your own analyst.
I based my hits on how I felt both physically and how deep I felt into the trip. let the molecule make a change, if I was comfortable with the change then 1 more hit. Granted it doesn't take that long and the time frame can be confusing but nausea comes before hyperspace I'm sure. When I puked I was overcome with the notion that I needed to purge and when I did, it was intense, kinda good and ultimately grounding.
A few years ago I was on an operating table, out cold and I puked. I think I'd been under morphine rather than some other general anasthaetic cos I was able to stir, lift and turn my head enough to puke over my shoulder. I remember morphine cos I heard the surgeon telling someone to give me 10 more cc of it.
One should always be cautious with these things. In short, I don't think puking in hyperspace is likely or even possible at all. If you're going to puke I'm sure you won't even get that far. but this is all opinion of course.
Eckhart saw Hell too. He said: "The only thing that burns in Hell is the part of you that won't let go of life, your memories, your attachments. They burn them all away. But they're not punishing you", he said. "They're freeing your soul. So, if you're frightened of dying and... you're holding on, you'll see devils tearing your life away. But if you've made your peace, then the devils are really angels, freeing you from the earth."