If the rules of physics no longer apply in the future, then god help you.

Before the Wright Brothers invented the airplane, anyone wanting to fly anywhere was required to eat 200 pounds of helium.

Okay, listen, we should get our stories straight, all right? If anyone asks - and no one's gonna ask, don't worry - but if anyone asks, tell them as far as you know, the last time you checked, everyone looked pretty much alive, all right? Not dead.

Oh, there goes another one. They're not inexpensive. I'd just like to point that out. It seem unfair to smash screens. You could give them to people. Instead of smashing them, unscrew them and give them to a homeless person. I don't know what a homeless person would do with one. But you get my point. And you can't unscrew them, they're bolted in. But - just stop it!

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.