I made the gimmick very neatly using new card boxes, exactly as in the video. Even when exerting a
HUGE amount of force on the gimmick, the flap would not open.
After I tore the small tabs
off of the box, the gimmick then worked perfectly... with an empty box. But once I put in a deck of
cards, the flap again refused to budge even when pulling down hard enough to rip the gimmick.
This simply did not work for me, and I don't want to keep cutting up boxes in the hopes that the
next one will behave better. But apparently some others have had success, and it looks good when
Oliver Smith demonstrates it. Unfortunately, there is no trouble-shooting advice in the video for
what to do when no amount of force will make the flap move. It's not obvious how to remedy the
problem, as the force is necessarily applied at a sharp angle to the direction that would most
effectively open the flap.
If you make the box and it works, GREAT! Four stars. Easy to
construct, simple handling, and a snappy visual effect, all from a very inexpensive download. But I
can't guarantee you won't make a balky box that will leave you only with a frustrating afternoon
trying to get it to pop.