Walter and Jesse in “Fly”

Walter

There's been a contamination.

Jesse

Wait, what? Whoa, hey, hold up!

Walter

Something got into the lab.

Jesse

So, uh, what do we do? I mean, do we... Wait, wait! Shouldn't we be wearing masks?

Walter

No, no, it's not that kind of contaminant.

Jesse

So it's, like, not dangerous? Mr. White, talk to me here!

Walter

Not to us, particularly, no.

Jesse

[noticing Walter's homemade fly swatter] What the hell is that?

Walter

This is, uh, I made it.

Jesse

Exactly what kind of contaminant are we dealing with here?

Walter

...Fly.

Jesse

What do you mean? Fly, like...like what do you mean?

Walter

I mean, a fly. A housefly.

Jesse

Like, uh, one fly? Singular? What'd it do?

Walter

It got into the lab and I'm trying to get it out, okay? Understand?

Jesse

No, man, not really. I can't say that I'm really following you here. Dude, you scared the shit out of me! When you say it's contamination, I'm thinking like an Ebola leak or something!

Walter

[scoffs] Ebola?!

Jesse

Yeah, it's a disease on the Discovery Channel where all your intestines sort of just slip right out of your butt!

Walter

Thank you, I know what Ebola is.

Jesse

Uh-huh.

Walter

Now tell me, what would a West African virus be doing in our lab, hm?

Jesse

So you're chasing around a fly, and in your world, I'm the idiot?

Walter

Jesse, listen. This fly–or any other fly, for that matter–cannot be in our lab. [overlooks Jesse from under his glasses] Do you understand, Jesse? It's a problem. It's a contamination, and that is in no way a misuse of the word, "contamination."