The bannister thing happens when the evil nanny (blanking on the name) gets lowered into the floor in her cage...at the exact same time, Mary slides up from the first to second landing. From what I can tell, a small post gets pulled open, she leans on it, flies up, and then she swings it back into the bannister during the dialogue ensuing. It's maybe no more than a foot long?
"Hey little girls, look at all the men in shiny shirts and no wives!" - Jackie Hoffman, Xanadu, 19 Feb 2008