Skillz, In-Game and Out

Mike: This reads very much like a tactics game.
Jerry: Yeah, doesn't it?
Chris: Well, the powers being attack powers, of course, and being the fact that your'e sort of playing on a minis battle grid, there is a lot of tactics involved. As you will soon see...
Scott: ...Wha?? We gonna figh--Wha?
Chris: You descend the staircase, and you see that the bones on the stairs appear to be, like, small animal bones.
Mike: Do any of them have iron teeth? I'm just saying, someone should check.
Chris: Then, what I'd like you to do is make a Perception skill check. On the back side of your sheet are your skills, and they're in a table. And Perception should be listed in there somewhere. Whenever you're asked to make an attack roll or a skill check or anything like that, you're always sort of rolling the same die, and it's the 20-sided die.
Mike: Guys, this is my first time rolling...
Scott: For reals??
Mike: For real, I've never--
Scott: I have to tell you, I find it hard to believe that you've never played Dungeons & Dragons.
Mike: Well, I'm not a huge nerd.
Jerry: It's important to roll well, or you will curse the dice forever.
...
Chris: In D&D, high rolls are always good.
Mike: So, I'm actually rolling because I said I wanted to look and see if they had iron teeth?
Scott: Yeah! See, that's a good DM right there. You were making a joke? But he's turned that retarded-ass joke...
Mike: Well, it was a pretty good joke.
Scott: Well? I mean, you know. It was pandering to the audience.
Mike: So whatever I roll, I'm gonna add +1 to it.
Jerry: Exactly.
(Mike rolls.)
Scott: Oh my god, your first roll is a 20!
Mike: Hahahaha! That's cool!
Scott: I mean, modified, but still!
Chris: You're able to take a look at the bones, and actually you see something. You don't see an iron tooth, but you see something else. You're pretty sure that these scattered bones were kind of left here deliberately, and that they have been gnawed on. That something lives down here and it basically feeds on animals and it scatters their bones on these stairs, and you also notice, as you're going down the stairs, that you're actually stepping on a few of them, and they're making soft crunching noises.
Jerry: Oh, I see. It's like an alarm system. It's like an old-school alarm system. I gotcha. Hey, do you mind if I roll my Dungeoneering? And make a guess at what would set up a trap like this?
Chris: You sure can.
Mike: What are you doing?
Scott: Wow.
Chris: He's got the Dungeoneering skill. He's gonna make a skill check and add his bonus there.
Mike: I've never even heard of "Dungeoneering". Is that like spelunking?
Scott: It means it's not his first time to the rodeo.
Mike: Oh, okay.
Chris: Yeah. Like, for instance, if you want to sort of study an underground chamber to see if there's a secret door there...
Mike: So, he's been in dungeons before, he knows about dungeons...
...
Mike: So, did you succeed?
Jerry: We'll find out.
Scott: We don't know.
Chris: Goblins. Definitely goblins.
Scott: ...I would have not even known to do that! I'm SO screwed!