Players often like to be stealthy, and then go and have their characters do things that would be impossible to do while keeping quiet.
Especially things that have incongruously loud movie sound effects, like activating an electromagnet or turning off the lights.
Commentary by memnarch (who has not seen the movie)
And this is the part where I, if I was a player, would say, "Shutupshutupshutupshut— Ahhhhhh crap."
And they're still in the same room? Uh oh. I'd thought they'd gone into different areas and rooms in the last comic. That doesn't bode well for Mr. Nameless's survival. Really though, the GM has been quite generous in not having swarms of troopers pop out of the woodwork metalwork. Movie-wise, this actually seems reasonable. The Death Star, while also very large and containing lots of troopers, didn't have them evenly spread out to be constantly run into while sneaking around.
Those red lights on the catwalk still look weird; like badly colored mo-cap balls or something. On the plus side, the charges Chewie is planting have close to the same light color, so they'll be slightly camouflaged. Not that I expect it to matter here, but it's the sort of thing I'd point out as a player.
Transcript
Chewbacca: I head up the stairs and look for suitable places to plant charges.
(No Name): That’s the good part. It doesn’t matter where you put them.
Chewbacca: Can I hear you?
(No Name): Why wouldn’t you?
[SFX]: klik {Chewie plants a charge and presses the arming button}
Chewbacca: I’m here on the map. You’re there, two levels below.
(No Name): We’re in the same room.
Chewbacca: Yes but the room is 100 metres across.
(No Name): It probably has good acoustics.
[SFX]: Thunk {No Name attaches a charge to a metal surface}
[SFX]: thunk... unk... nk...
Chewbacca: So any guards in the area could also hear you. I suggest stealth.
GM: <roll> <roll>
[SFX]: klik {Chewie arms another charge}
(No Name): Well now who’s talking?!
[SFX]: “talking...” “alking...” “king...”
GM: <roll>