You are Dr. Seuss, the world's greatest doctor, and tonight is your last night in the hospital. It's time to go to bed, but you can't sleep. The reason is that there is a giant mutant shark in the ocean that is eating all the fish.

To make sure that the fish are safe, you must go to the hospital and take the rest of the patients with you. As you get ready to leave, the nurse asks you a question. And the question is: what is your greatest fear?

And you have to answer: the shark.

You have to go back to the hospital the next day. And the day after that.

In each of the days, the nurse asks you the same question. And each time you have to answer: the shark.

If you don't want to go back to the hospital, you have to find a way to get rid of the shark.

You try and you try, but you can't.