I don't want to be in a position that could make me vomit,...

I don't want to be in a position that could make me vomit, like air travel. I've purloined airsick bags and stuffed them everywhere, just in case I ever feel the need to throw up. I haven't vomited since 1977, but I think about it all the time. I recognize that it's irrational, but I'd rather jump out of a window than vomit.