The only times I’ve been a bit worried have been eating chicken that I could get down with water so not really the same thing but sometimes I’ve it’s gotten difficult enough I’ve wondered if I’ll need a bit of help, but that’s not really choking or close to blackout. Unfortunately the times I remember I’ve been alone, in an apartment building 10+ floors up in a foreign country. Agreed the safest bet is others but based on those situations I think there are times where it’s tough to guarantee another person will see you and I was aiming to learn what my last resort should be.