>Kelley had been standing on a foot ladder looking at the contents of the mixing tank through a viewing window when the excursion event occurred. Two other technicians working within the laboratory witnessed a bright flash of blue light followed by the sound of a thud. The power burst either caused Kelley to collapse or knocked him off the ladder, and he had fallen to the ground. He arose disoriented, and apparently switched the mixer off and then back on again before running out of the building. The other technicians found him there in the snow in a state of ataxia (uncoordinated muscle movement) and only able to say to them, "I'm burning up! I'm burning up!"