How useful is it really? Is it anything more than a passing fad or yet another outlet for online porn? What happens once the gimmick gets old?
MADtv alum Will Sasso has answers to none of these questions, but his ongoing series of Vine clips in which he spontaneously expels a full-size lemon from his mouth in respond to various stimuli does more than words ever could to explain why Vine was invented in the first place: So that this could come to pass.
Also, just a heads up: Irrespective of what anyone in the comments says, don't google "Lemon Party" for an "even funnier video."