Maybe critical but 12 minute mark the guy must have forgot and was holding another signed coined in his hand right out there to see with the other still attached to the balloon. When he cuts it open he just slides it in the bowl.
Magic Bones trick was annoying because if i watch the lady tear up the 3 of clubs, and you make it appear again its not magical at all it just super obviously another 3 of clubs, which just ruins everything.
Moritz should better use his psycho studies to wipe away that grin off his visage. 11:50 and 12:01 show different signatures on the weight. The rest can be easily explained. Hint: In the end it's the 11:50 sign that is revealed.
Final explanation: At 12:13 he inserts the chip into a pocket in the corner of the ballon, that is going to be cut open. 12:36 And again we don't get to see how the falsely signed chip gets disposed of. CW production and camera angle cuts are crap!👎 Oh, and there might also be an implication of electrostatic attraction regarding the balloon drop and its metallic surface coating, but maybe s.o. has a better suggestion.
Penn & Teller: Fool Us /// Magician Magical Bones - Season 7 Episode 27