VIDEO: We have a new perspective on the natural gas explosion that rattled Sun Prairie on July 10. The blast was caught on nearby surveillance video. Authorities say a construction crew struck a gas main in downtown Sun Prairie on July 10, resulting in the explosion. Fire Captain Cory Barr was killed as he helped evacuate people prior to the blast. Eleven other people were hurt. Six buildings were destroyed. The new video we're seeing was perched on the Sun Prairie Utilities building just a block away. In it, people can be seen watching activity happening a block away, as firefighters evacuate the area after the gas main was struck. In a flash everything changes. The explosion so powerful it rocked the camera and seemingly everything else.