Eat a lemon wedge. If you can find some bitters in your great aunt's liquor cabinet, soak the lemon wedge in some of that.
Bitters are a liquor prepared from bitter herbs and roots, traditionally used for stomach ailments.
Gulp down a teaspoon of sugar. Its high carbon content and quick entry to your bloodstream will help. Locate your uvula. It's that tear-shaped flap that hangs from the back of your throat. Touch it gently with the handle of a spoon.