David and Leeman perform on America's Got Talent 2014 Top 12 (VIDEO)

David and Leeman performed on the America's Got Talent 2014 Top 12.

So their act is another predictive magic trick, as they have a giant scratch-off lottery ticket onstage. They ask each judge to pick a balloon to pop, and then select a number to plug into the giant scratch-off ticket. Howie picks the number 6, Mel B picks the number 69, Heidi picks 41, and Howard picks 86. They pop a yellow balloon, which reveals a scratch off ticket they give to Howard. Howard scratches off the numbers one-by-one, and each number is correct -- except for Howard's, which reads 85. However, there's a rule on the back of the scratch ticket that says that if any of the numbers are wrong, David and Leeman must give the judge their jackets. The pair remove their jackets, revealing writing on their backs: "Howard will be off by one." Insane!

Howie is speechless, and has no idea how America will decide. Howard thinks this is a fantastic act, for a fantastic season. Heidi feels they just might win the AGT lottery and score themselves a million dollars. Mel B, meanwhile, loves that the duo continually has her guessing about how they did it. They keep me guessing too, but then, so does every magic act on this show. I lack the intuition to piece the "how" of these tricks together. Anyone got theories on how they did it that don't involve a conspiracy with the judges?

But what do you think of David and Leeman?

Watch the performance video here: