Do you get hiccups frequently? Opiniorama shares a method to stop hiccups quickly (in case you don't have a spoonful of peanut butter!):
I decided to do a little stretching while holding my breath so placed my hands above my door frame and leaned forward, and what do you know within seconds the hiccups stopped. You should feel an arch to your back and your abdomen stretching. Continue to push your hands upwards and let the weight of your body send you through the door frame. Maintain this stretched position for 30-60 seconds while holding a big breath.
http://www.opiniorama.com/opiniorama/2007/02/15_second_cure_.html - via digg