When I got an original Game Boy with Tetris for Christmas, I was happy. I showed my sister and when the Teris copyright info came on, my sister said, "Hey, it has Bullet Proof Software on it! So is the Game Boy bulletproof?" "I don't know," I said. Then, out of curiosity, I smacked the Game Boy on my head really hard, and it still worked. "I guess it is!" I said.