I flipped a coin today. There was a 50% chance it would land heads. There was also a 50% chance it would not land tails. Multiply those together, and it was an amazing 1 in 4 shot that I would flip a heads, but I did! Except what he did wasn't that. It was: a 50% chance you flipped tails and then a 50% chance you flipped tails on the second flip. Also there was a 50% chance I flipped a separate coin heads, and then a 50% chance I'd flip heads again, and a 50% chance I flipped heads again.