This is a relatively strong effect that but takes moderate practice to handle the handling well. Set
aside an hour or two to get the handling right, but it is not an effect you will be able to just
watching it once through.
My instructions were badly printed with the printed words on two
of the pages being printed on twice with misaliged words so I was seeing double of each word on
those two pages. It made reading the instruction slow and confusing. On the pages that did print
well, I wish that the instructions for making the gimmick were a little clearer. (Yes, you have to
make your own gimmick the first time round, so that takes 15mins or so).