The light technician was supposed to cut the lights off when he "took a dive." The audience were not supposed to see the wire. when he landed, he would then detach the wire and the lights will go back on and it would appear to be as if he landed the jump.
So yes. There was a big F ^.
Plan B: they played it off with him bailing out into the darkness.
Failed magic tricks cant hurt reputation.
and that bullet trick..pure C.G.I