This seems very valuable. Will try, and try to remember to post results.
Another datapoint: I tried this a while back with mustard powder in warm water. I ate some chocolate, then downed around a cup of warm water with mustard powder (I forget how much powder it was). This was insufficient to make me vomit; I only felt slightly nauseated. I tried using my finger, wrapped in toilet paper, to agitate my uvula (the thing that hangs from the roof of the mouth behind the tongue). This made me gag, but not vomit. I tried again the next day, with the same results. I may have eaten slightly less chocolate after this, but I failed to de...
Thus spake Eliezer:
It seems that many here might have outlandish ideas for ways of improving our lives. For instance, a recent post advocated installing really bright lights as a way to boost alertness and productivity. We should not adopt such hacks into our dogma until we're pretty sure they work; however, one way of knowing whether a crazy idea works is to try implementing it, and you may have more ideas than you're planning to implement.
So: please post all such lifehack ideas! Even if you haven't tried them, even if they seem unlikely to work. Post them separately, unless some other way would be more appropriate. If you've tried some idea and it hasn't worked, it would be useful to post that too.