Six people were taken to the hospital after a floor collapsed in Mukwonago Wednesday morning. It happened around 8:30 a.m. at Kay's Academy of Dance in Mukwonago. According to Fire Chief Jeff Stien with the Mukwonago Fire Department, crews were laying concrete on the second floor of what will be a two-story building, and due to "some sort of failure" the floor partially collapsed. A woman who works at the liquor store across the street says she heard a crack and saw the whole thing come down. Several local emergency agencies responded. All six taken to the hospital were workers for GI Concrete out of Racine. Their boss on scene say they were all on top of the floor when it came down about 15 feet, falling alongside concrete and steel.