 Transtrom was best known for his dramatic stunts and performances with high frequency, high voltage electricity from a Tesla coil.For his "Lightning Man" demonstrations, he stood on a large Tesla coil which made sparks (electrical discharges) come out from his outstretched fingertips.There is a long-standing rumour that Transtrom was electrocuted during one of his demonstrations when one of these long sparks reached the primary coil of the device, thus coupling and drawing enough current to kill him, making him one of only three people to have been killed by a Tesla coil.