Mark Wilson, Mark Wilson's Complete Course in Magic, Ottenheimer Publishers, 1988

AS SOON AS YOU ARE INSIDE THE HOUSE, YOUR ASSISTANT IMMEDIATELY STANDS UP, PICKING UP THE ROOF AS SHOWN HERE

(9) NOTE: YOU AND THE GIRL MUST PRACTICE THIS MANEUVER UNTIL IT BLENDS INTO ONE FLOWING MOTION. THIS MOVE IS SO DECEPTIVE THAT, IF DONE CORRECTLY, THE AUDIENCE WILL BELIEVE THAT YOU NEVER LEFT THEIR SIGHT.