G.O.B. sticks the stake through the apple, then moves the stake to his neck. He acts as if it is puncturing his neck and blood squirts out.
What went wrong
Marta's young boys, Amable and Cortesio, freak out and think it is real. Marta gets upset that G.O.B. would frighten them but G.O.B. thinks she is trying to get him to reveal how the trick is done.