He just did because he was thirsty, and he had to pass some time.

Charlie

Dude I can't stop drinking now, I'd probably die!

Charlie

Mac: There's a secret hatch on the airplane that allows me to travel anywhere.
Charlie: Yeah, everybody knows that.

Dennis: How many sleeping pills did you give that kid?
Frank: I don't know? 7? 12?

Girl: You know, you're weird.
Dennis: You have no idea.

Frank: You don't think I'm a pilot?
Flight Attendant: I don't think you're a doctor.

Flight Attendant: You've drank 14 beers.
Frank: You don't know that!
Flight Attendant: It's written on your shirt.

They say I can't drink on a plane. They say I can't bang on a plane. They say I can't be a doctor!? A pilot?!

Frank

I can do it just give me the bat I got game.

Charlie

Charlie: It's a Wade Boggs style! Give me another one!
Mac: You know, that's the only ball I have. And I didn't really expect you to hit one.

I need an Advil, a roll of duct tape, a pack of peanuts, and four beers.

Frank

Oh sorry, let me explain. We're doing a Wade Boggs type thing, and that makes me sort of the Bud Selig of the group.

Mac

It's Always Sunny Quotes

Charlie: I'll totally pull a Good Will Hunting on those kids and that'll put them in their place.
Mac: How you gonna do that?
Charlie: Well, you've seen the movie right?
Mac: Yeah.
Charlie: So all I gotta do is, I'll ask them some big shot, like math or science, history-type college question aand that will totally stump them by knowing a lot more about the answer than they do.
Mac: In that movie, Matt Damon played a genius janitor, you're just a janitor.
Charlie: Right, you stumped me with that one.

Mac: He doesn't have any poison.
Charlie: I don't have any on me, but I do keep some in my fridge at home in the relish jar.
Frank: There's poison in that jar? I thought I was allergic to pickles. What's in the jar with the skull and crossbones?
Charlie: Well that's mayonnaise. It's a decoy.
Frank: And the mayo?
Charlie: That's shampoo.
Frank: You're telling I've been putting shampoo on my sandwiches?
Charlie: If you've been using the mayonnaise, then yeah, probably.