Laura: John, What’s the matter with you? You look so down.

John: We will have a big exam tomorrow in Physics, and I’m afraid I’ll fail.

Laura: Have you been studying?

John: You know me. I study all the time. And I know the material until I step into the exam room.

Laura: What happens then?

John: It’s like I’m two people. Once I pick up the exam paper, all my knowledge is gone.

Laura: That’s hard to believe.

John: But it’s true. My head is filled with a buzzing noise, the words blur on the page, and I can’t think. And…

Laura: And what?

John: And I break into a cold sweat.

Laura: Oh, I feel for you.