This application displays the message, "HELP I AM CHOKING" along with an audio version of same. The "CHOKING" text alternates between a white and a red background. A button switches to a simple exhibition of the Heimlich maneuver.
If you have ever been choking and had trouble getting the attention of your companions with the usual grab-at-neck gesture, then this app may be worth a try.
** Note that this is for novelty use only! **