Thanks to ThinkGeek’s Mega Stomp Panic, which they call an “audio reality costume.”
As you can see, it isn’t just for gamer dorks who wish to dress up as Super Mario this upcoming Halloween (or at any of the multitude of conventions that take place throughout the year). It’s also for folks who want to dress up as a zombie, robot, monster, pirate, or cowboy. Also any time of the year.
At the very least, it’s far more functional than their arcade stick at a light switch cover. As well as a hundred times more (potentially) annoying.