When Marni's mom is in the store checking out she is going on and on about having an empty nest. While she is doing this she slides her credit/debit card. But when she slides it it is upside down. You can clearly see the magnetic strip. She then pushes the buttons like the card had been read by the computer. She doesn't notice and the Cashier doesn't say anything. She is not using magic either. This is clearly a slip-up.