If you’ve ever tried out Virtual Reality, the FIRST thing you’ll feel is the tug of the helmet cable as you virtually (and actually) try to walk down the path. Many HMDs use the weight of a rear exiting cable as a counter-weight to offset the heavy front end containing the displays and optics. In 1995 a Canadian company, Dynamic Visions, using the lightweight Kaiser Electro-Optics VIM, offered a solution (No, I’m talking about the human attendant to wrangle the cable):

Actually it’s a flexible post dangling the cable above the gamer.