translation.en: And then I realize the octopus won the arms race, because I was out and he had six left.  But the only way I can describe what I was seeing that day was that this octopus was playing, which is a pretty sophisticated behavior for a mere invertebrate.
translation.zh: 我忽然意识到在这样一场比赛中我永远不是章鱼的对手， 因为我一共只有两只胳膊，而它还剩下六只呢。 但是我想通过这件事告诉你们的就是 这只章鱼当时正在玩耍， 这对于无脊椎动物而言是一种相当复杂的行为。