If it weren't for Piers Morgan and the wild card round, the Kinetic King would have ranked much, much higher on this countdown.
The King didn't just fail during the quarter finals of Season 6. He failed in epic fashion.
Which was especially painful to behold with consideration for the fact that the King had literally spent hours, if not days, setting up his act.
Yet his chain reaction sequence not only failed to activate; it failed to activate multiple times, forcing the King to actually climb up onto the stage and start kicking his routine along, then inviting Nick Cannon up onto the stage to help him tear it apart.
"What a shipwreck," the King was heard saying, followed by "I mean, if you're gonna' blunder, you gotta' blunder big."
Anticipation for the King wasn't exactly high. He'd deliberately characterized himself as a sort of goofy science guy (complete with wearing a bicycle helmet and a bath towel strapped to his chest for protection), and his act was so unconventional that nobody really knew what to expect from him.
But one thing was certain: Nobody expected him to falter this badly.
Fortunately, Morgan evidently felt so bad for the King that he chose to bring him back as one of his four wild card acts.
Amazingly, in spite of having spent days without sleep planning and setting up the previous act, the King did elect to return, and this time set up a sequence that was less technical in its construction but more successful in its deployment.
And it paid off, earning the King, not only redemption, but a spot in the semifinals.
The next act to be named also earned redemption in the wild card round, but was not so fortunate when it came to America's vote.