Things you would NOT want to see happen at the ATM
You go to get a balance inquiry, and instead of printing out a receipt the screen says: "Not worth wasting paper", and ejects your card. You try to get a balance inquiry, and the screen says: "Account not found." and keeps your card.
You insert your card, and try to get some cash, and the ATM laughs and spits out your shredded card.
You withdraw some money to pay some bills, count it, and the screen says: "What, you thought there was some EXTRA there? HA!", and ejects your card clear across the room.
You think you've got $100 in your account and go to take out $50, and the screen says: "Not in this lifetime." and laughs as you bang on the machine, trying desperately to get your card back that the machine has taken.