Stanley: Are you okay?
Mimi: Huh, if you call radiation poisoning "okay".
Stanley: Were you out in the rain, too?
Mimi: Heavens no! I touched a building when we came out of the shelter.
Mimi: Look, you can stop pretending.
Stanley: What do you mean?
Mimi: I audited your farm. Why do you care?
Stanley: Maybe I'm a nicer person than you.
Mimi: Right. Were you in the rain?
Stanley: Yeah, for about twenty minutes.
Mimi: Well, you look pretty good.
Stanley: Thanks. You know, try to work out.
Stanley: Look, um, you know I think I got the worst of it, so as long as I'm okay, you should be fine.
Mimi: You're really sweet. And you still owe the IRS $180,000.
Stanley: They’ll be really sorry when my spider powers kick in.
This refers to Spiderman. In Spiderman, Peter Parker was bit by a radioactive spider and then recieved special powers. Stanley stood out in the rain for twenty minutes.
Four Horsemen (of the apocalypse) are mentioned in the Bible in the Sixth Chapter of the Book of Revelations.
The four horsemen are named Pestilence, War, Famine, and Death.