At least once a day, Sparky will completely freeze up and not continue with the turn. Either trying to figure out how to cheat a card into the hand or failing that, just doesn't do anything. Sparky REFUSES to block lethal damage with valid blockers on the field. Sparky also refuses to make wise choices when given them. If Sparky is low on life, it'll still choose to take the damage instead of letting the damage be done to a creature. I'm not sure who programmed Sparky, but that person needs to be fired.