It is wrong to purposely embarrass someone else.
Jimmy was at the talent show as his competition Billy got on the stage.
Jimmy wants to win the talent show.
Jimmy uses the time to practice his own talents during Billy's show.
Jimmy heckles Billy during the show to try and throw him off his game.
Jimmy does his best, and he is able to outperform Billy and win the competition.
Billy screws up because of the taunts and Jimmy wins the show, however people no longer like Jimmy.