i love this trick so much i never would have thought of that

Without giving too much away this uses a gimmicked card box which I think is great because we all carry card boxes around so we may as well make use of them. A nice trick but more importantly a nice gimmick which can be used for all sorts of effects.

Yes, it's a very clever gimmick, and I admire the way it works... but there's just no magic here. The move required to the trigger the gimmick is done openly, and the obvious conclusion the spectator will come to is that this is somehow a trick box... so naturally, they'll want to look at it, which obviously, you can't let them do.

Masuda effects are almost always exceptionally creative and different. This is no exception... unfortunately, this doesn't always translate into a good effect. Too much of the thinking seems to be devoted to the cleverness of the gimmicks, rather than the strength of the effects you can do with them. Unfortunately, this is a prime example of an effect that's not nearly as good as the thinking that went into it.