I guess you wouldn't want to hear my sure-fire hiccup remedy either... Drinking margaritas is guaranteed to give me at least one freeze, putting the palms of my hand around the front of my neck always worked better for me than the tongue in the top of the mouth trick. Question- are you supposed to use your own tongue on the top of your mouth?
I heard more than once that at the moment you are enduring a brain freeze, you are very close to death. Anybody heard that? Go to Snopes, I suppose.
It makes sense. I think it has to do with constriction of the vessel as someone else pointed out.... leading to a sudden drop in blood pressure.
What if your tongue is also cold? Won't that just make things worse? Of the two theories -- that there is a nerve at the back of the throat or that the blood runs cold -- I like the blood theory better. You can tell from the sensation that it is a delayed reaction thing. Once you feel the freeze coming on, you can't just stop: it's too late at that point. A nerve feedback would be more instantaneous I would think.
I'm assuming sarcasm anyway, but just to be safe, I want to make sure I wasn't implying any type of racist overtones like "these people don't have brains, so they don't get brain freeze." I was just remarking that in this limited but bizarre instance, people I know of difference racial backgrounds have different experiences re: brain freeze. Differences, that's all. Like white people have names like "Lenny," and black people have names like "Carl."
May be they eat slowly so they don't get the freeze effect? I get it, like others said, when I try to drink a Margarita too quickly. Haven't gotten one from ice cream since I was a child, though. Maybe I don't try to stuff ice cream down my gullet anymore?