One Christmas morning when I was young, I opened a present that had been advertised that year as “the wacky doctor game where you’re the doctor.” It was a brand new board game that had just been released by Hasbro, and was appropriately named Operation. You’d pick up a card from the pile, and it would tell you what surgical procedure to perform, saying something like: “Take out your patient’s broken heart for $100.” If you succeeded in taking out the patient’s heart, you got the money. The one who made the most money performing successful surgeries won the game. The catch was that you had to use a pair of metal tweezers that couldn’t touch the metal edges of the cavity in which the heart sat. If you did, it would create an electrical circuit, and that would make the patient’s nose light up and a speaker buzz. The game was all the rage that Christmas because the first successful heart transplant had been performed earlier that year.