'America's Got Talent' threw a few curve balls at its audience on Wednesday night's results show. Traditionally, the show invites three to four acts up on stage and then host Nick Cannon announces which one will advance to the next round.

Lightning performers ArcAttack, magician Dan Sperry, the dance duo known as Future Funk and singer Kristina Young had every reason to think that at least one of them was going to the finals after they were called up to face the judges.

But Cannon shocked the crowd by saying that it was the end of the road for all four acts.

"I'd never seen that," said judge Piers Morgan after the program. "I had no idea it was going to happen."

Howie Mandel had the deciding vote after fellow 'America's Got Talent' judges Sharon Osbourne and Piers Morgan chose, respectively, aerial artists Michael and Ashleigh and Harmonica Pierre to be the final winning semi-final act on last night's wild card results show.

Mandel's decision to side with Michael and Ashleigh had everything to do with talent and nothing to do with the fact that his on-air nemesis Morgan had championed the harmonica player.

"First, I apologized to Pierre for buzzing him on Tuesday's show," Mandel told TV Squad after the results show broadcast. (Mandel hitting the strike button at the top of the harmonica player's act was meant for Morgan, who kept buzzing the acts that Mandel and Osbourne had invited back to the show.)