Pretty sure the trick just involved the illusion of the audience disappearing while a combination of that and hypnotism compelled them all to actually leave, with the mist just serving as a distraction and a focus for the hypnosis, so I guess he could. I just thought there were objections to that already for some reason. Sorry, my thinking's been a bit unclear. I've had some stuff going on lately. If no one objects I'll go with that.