Videos: AGT amok - Gymkana accident with fire, Fatally Unique insane asylum, Summerwind Skippers apocalypse!

It's the second week of the America's Got Talent Semi-finals, and the contestants are trying to make an impression on the audience. Dancers had mixed success: the judges told Snap Boogie and Silhouette that they weren't exciting enough.  Fatally Unique's insane asylum routine was good but perhaps not "fatally unique enough"  Summerwind Skippers (which includes members of America's Best Dance Crew Season 5 Saltare) skipped till the world ended, but Piers Morgan complained about mistakes (watch it here). And Gymkana's act was cut short when they messed up a trick with fire and burned two members.