We all have a certain propensity for obnoxiousness now and then -- it's just human nature. What's not human nature is an app called "Fart Contest." Pique your interest? There's also an app specifically made to make the loud, obnoxious droning sound of a vuvuzela, the instrument popularized by the 2010 FIFA World Cup in South Africa. Or the dozens of apps that involve virtual drums.
