After seeing explanation,I was totally disappointed.
Looks great on demonstration. But I don't
think it would fly by on real world.
Also the author did not show a full demonstration for real
audience in the instruction video,only edited demonstration as seen on advertisement.
I think
the gimmick is too obvious and can not stand close up view. It will flash under sunlight and also
there is little noise that can be heard which could give away the method.