When you're playing a game, everything is obviously a trap.

Because everything really is a trap, so it's obvious through sheer genre-savviness.

Transcript

Luke: This is bad. It's too quiet. No way did we sneak in undetected.
R2-D2: We didn't even get asked to make a roll.
Luke: It's obviously a trap.
R2-D2: I'll hack into the city mainframe and download everything.
[SFX]: < doop boppity-bleep bedooby bebedoop-bizang kibuzz boodoot >
Luke: Good idea. See if you can find a map.
GM: You see a helmeted figure leading two guys pushing some sort of hover trolley.
Boba Fett: First lead in 13 years, and Vader goes and kills the fool.
Boba Fett: Well, I'm not giving up, you hear me, universe? I shall wreak my hate upon him!
Boba Fett: I need Jabba's facilities.
Luke: He needs what?
GM: Stealth check.
Luke: Oh, now I need to roll?
Boba Fett: You think this is funny? I amuse you?
[SFX]: Pow! Pow! {Boba shoots at him}