The castmate who spoke on condition of anonymity said the cable to Tierney's harness snapped. But one special-effects expert raised the possibility that the rope was not hooked up securely.
Scott Fisher, president of Fisher Technical Services Inc. of in Las Vegas, which builds equipment for aerial stunts for the show, said the rope was supposed to be clipped to the
stage at one end and the performer's back at the other.
"The
stage crew would have been responsible for making the connection for hooking him up," Fisher said. "The actor is responsible for making the final check that he's good to go. It's sort of like packing your own parachute."
He said the script called for the stuntman to lurch forward at the end of a ramp as if leaping to Mary Jane's rescue. "He runs and stops and freezes in a position that you wouldn't normally be able to hold unless you had a little support from behind him," Fisher said. "If that's not hooked up and he leans forward, he's going to fall forward."
Fisher said the rope was not part of his company's onstage flight systems. But he said it was unlikely to have snapped: It is a 10,000-pound
line.