Oh, a challenge then? After popping Alan Keane after 'the vision' episode, Nicole gets tired of Gumball's harassing Alan out of jealousy. Refusing to believe Gumball and Darwin when he explains Alan was planing to be a dictator Darwin: You gotta admit, it's a bonkers statement from an outside observer So she calls his parents over to make gumball apologize and FINALLY put this 'silly' feud of Gumballs behind them. Gumball, learning that Alan's parents will soon be able reanimate him from the dead ancient balloon people secret , knows he must kill them before they revive his potential dictatorship. So while Nicole showers, he takes her clothes and deliberately puts a ridiculous amount of static cling on it so the sentient balloons will be drawn to her and end up popped.