Charleygirl This is how I think the trick was done. You can check the video of it again on Youtube. When the girl lights the poles, if you notice she doesn't do the ones on the left hand side (as you look at the screen). She climbs the steps that are at the side. He obviously isn't strapped in properly as it appears. Anyway, he wriggles into the hollow of the steps and is then wheeled off stage along with the girl. Not sure how they do the shadow bits of him trying to unlock the straps. It looked pretty impressive though.