The explanation is in English
The magician invites a spectator to find out where the bag with the egg is
The spider is an Australian Redback spider Latrodectus hasseltii a relative of the American Black Widow and are quite dangerous
Besides you get 3 more regular chips
It eliminates the chance of accidentally spending those beautiful trick coins
The Art of Switching Decks | Roberto Giobbi & Hermetic Press Tyler The explanation is in EnglishThe strongest card tricks most often depend on a stack or special deck. Unfortunately, if you start with a gaffed deck, as soon as you have accomplished the impossible feat, its very strength causes audiences to say, "Let me see those cards!" With a deck switch, they can, because you just switched the gaffed deck for a normal one, which they can even take home! A deck switch can also allow you to start with an ordinary deck, convince everyone it's you