Question I need an answer to.

Okay I have a issue I need some brain storming for.

The situation is two characters are trapped in a sound proof room. There is a window with thick glass.

The characters don’t have the means to break the glass. They can however see somepony outside who could help.

How would you get them noticed?

Comments

[Rewind42]

I think the simplest thing would be a bright flash of light, if possible. Sound can’t escape so it’s got to be something that will grab their attention. If the outside person is facing away from the two, maybe a light turning on and off behind them would be noticeable, like someone flashing their car headlights is.

[ShadowStar_IMHP]

5605478
Yeah that could work. It where I’m leaning towards.

It a situation I won’t get to till the climax of my story.

[GoldR]

Reminds of the first scene of the movie "saw 7"
https://youtu.be/-hzbNjxnxiI

[ShadowStar_IMHP]

5605489
Nothing so gore filled.

[EverfreePony]

Note that it's quite hard to make a soundproof room with a window. There's also a difference between a room that'll make it so anything spoken inside cannot be heard outside, and a room where the window is so thick that even directly hitting it cannot be heard.

[ShadowStar_IMHP]

5605507
True I was trying to be as spoiler free as possible. So I didn’t elaborate on the details.

Two characters trapped in a room trying to get someone’s attention is a very common trope I think. So I wasn’t afraid of giving out the climax.

[HorseWordFan]

Aside from light flashing, there's also sound in the form of vibrations. If they could somehow generate either a loud single instance of noise, or a repeated series (think heavy bass going off) of noises, it could do it.

Making the floor shake is bound to draw some notice.

[QuackHeadBandit]

Lots of motion/banging