The sixth season of America’s Got Talent has its top 10 , and we’re incredibly close to having a final round that does not include any mediocre singers. That group does not include Gymkana, the tumbling group that was eliminated from the show, perhaps because the flaming ring its tumblers were jumping through fell onto one of them during their performance Tuesday. As you can see in the video of that performance , one person caught the flaming ring, moving it out of position and causing it to fall on the next person. He stayed on the floor, the flaming ring lying on his leg. He looks like he’s going to stand up, but then stays on the floor as the two people holding the ring lift it off him. In this clip of the full performance , host Nick Cannon repeatedly asks the performer if he’s okay. After the ring falls, people are briefly visible running in from the side of the stage, presumably stagehands ready to assist, but two of the show’s judges are criticizing the response. Howie Mandel ...