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"America's Got Talent": Human cannonball, string musician steal the show

William Close performs on "America's Got Talent." NBC

(CBS News) Twelve acts competed in the last quarterfinals round Tuesday night on "America's Got Talent," and they included dancing dogs, a human cannonball and a man who plays unique string instruments.

The acts competed for America's votes and one of four spots in the show's upcoming finale.

First up was David "Bullet" Smith, the human cannonball. He attempted - and accomplished - a 40-yard "human field goal," flying 70 feet in the air. The stunt, which took place outdoors, was filmed on Monday, according to

Other acts that performed for judges Sharon Osbourne (who may be leaving the show), Howard Stern and Howie Mandell were All That! (a clogging dance troupe), singer Ulysses,  artist Joe Castillo, 10-year-old Mariachi singer Sebastien, mind reader Eric Dittleman, musician William Close, gymnastic dance troupe Unity in Motion, singing duo Eric & Olivia, acrobatic dancer Lindsay Norton,  and self-described "king of the nut chop" Horse and animal act Olate Dogs.

Ulysses got the Xs from all three judges, but it was Close and his "earth harp" - a giant, violin-like instrument - that earned the most praise. Mandel announced, "We're done." Stern said, "Give him the million dollars." Osbourne praised his professionalism.

Four acts will be chosen to advance to the next round on Wednesday's episode.

Tell us: Who do you think will win "America's Got Talent"?

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