Jonatan Riquelme performs Rolla Bolla on America's Got Talent 2014 (VIDEO)

Jonatan Riquelme performed on America's Got Talent 9 Quarter Finals #4 on Tuesday, August 19, 2014.

I was MORTIFIED throughout all of this, and not just because the act was scored to the world's most panic attack-inducing music. Jonatan basically stacks a series of metallic cylinders, with the rolla bolla in the middle like that superfluous third slice of bread inside a Big Mac. He does this while already balancing on a giant swing, which had my heart pounding like crazy. As the swing lifted into the air, it seemed like Jonatan was almost certain to fall, especially given how horrifically wobbly the tower was. But Jonatan was able to climb to the top of this stack, balanced precariously on the rail-thin swing, and remain poised atop for about five seconds or so. And thank God that was it, or I might have passed out from worry.

Mel B was horrified for Jonatan, uncertain whether he'd fall. But she applauds the act and tells him he did a good job. Heidi echoes the sentiment, although she seems less enthusiastic about the performance. Howard, however, says this is the first rolla bolla act he's seen that actually deserves a place in the finals. Howie likes the act but doesn't know why he wouldn't at least put a crash mat on the ground. He says Jonatan is exciting and daring and deserving of a semifinal spot. I've never been a big fan of the death-defying acts, but I do think Jonatan has guts like few contestants have ever had on this show. Is that worth a semifinal spot? I suppose we'll see.

But what do you think of Jonathan Riquelme?

Watch the performance video below: