Any one of these might work: Breath into a paper bag. Eat a teaspoon of granulated sugar. Hold your breath. Drink a glass of cold water. Pull on your tongue. Lift your uvula with a spoon. Your uvula is the fleshy piece of tissue that is suspended above the back of your throat. Attempt to purposefully gasp or belch. Bring your knees to your chest and maintain this position. Try a valsalva maneuver by holding your breath and bearing down. Relax and breathe in a slow, controlled manner.