You find a Golden Pearl and you are about to swim towards it. So far so good, it looks like you are making good progress, you can't believe that you found a Golden Pearl so fast, a part of you thinks that this is too easy and that this could be a trap, but you are feeling so giddy that you might be able to get back home to the real world so fast that you throw that caution into the wind.
You later learn the hard way that the part of you that warned you that this was too easy and that this could be a trap was proven to be correct, as you reach to grab the Golden Pearl, you are ambushed by a Merman, he will try to get you, if he does, it will be game over.
You had better swim as if your Human life depended on it because it does.