There's very little sound as the footsteps grow louder. As the footsteps are joined by shouting, distinctly just on the other side of the wall.

And then, there's an enormous crash. It may not have been the wisest choice to enter, but spots of bright light flare up in the darkness, shining over the racks of droids, the control panels -

"Announce yourselves!"

The troopers' flashlights don't find any intruders. But they do come upon a droid that has fallen from the racks. And then another.