Cave Johnson: Greetings, friend. I'm Cave Johnson, CEO of Aperture Science. You might know us as a vital participant in the 1968 senate hearings on missing astronauts. And you've most likely used one of the many products we invented - but that other people have somehow managed to steal from us. Black Mesa can eat my bankrupt-...

Caroline: Sir, the testing?

Cave Johnson: Right. Now, you might be asking yourself, "Cave, just how difficult are these tests? What was in that phonebook of a contract I signed? Am I in danger?" Let me answer those questions with a question. Who wants to make sixty dollars? Cash. You can also feel free to relax for up to twenty minutes in the waiting room, which is a damn sight more comfortable than the park benches most of you were sleeping on when we found you. So! Welcome to Aperture. You're here because we want the best, and you're it. Nope. Couldn't keep a straight face.

For this next test, we put nanoparticles in the gel. In layman's terms, that's a billion little gizmos that are going to travel into your bloodstream and pump experimental genes and RNA molecules and so forth into your tumors. Now, maybe you don't have any tumors. Well, don't worry. If you sat on a folding chair in the lobby and weren't wearing lead underpants, we took care of that too.

The lab boys just informed me that I should not have mentioned the control group. They're telling me I oughta stop making these prerecorded messages. That gave me an idea - make more prerecorded messages! I pay the bills here; I can talk about the control group all damn day.

Marie Curie invented the theory of radioactivity, the treatment of radioactivity, and dying of radioactivity.

Did you feel that? That idiot doesn't know what he's doing up there. This whole place is going to explode in a few hours if somebody doesn't disconnect him. I can't move, and unless you're planning to saw your own head off and wedge it into my old body, you're going to need me to replace him. We're at an impasse.