I was playing with a 12 year old, and I managed to convince him to let KC, Goons, and Masquerade in the kingdom. He was not happy. He said he would never play dominion with me again. We had to eat lunch, and after we got our lunch, he said, "We should play dominion while we eat lunch!"
After lunch, we played again and I set up an amazing engine, got Tournament (and all five prizes) from the Black Market, and crushed him with all eight provinces. He said he would never play with me again.