Oh, he can hear him, alright. The sounds cause Damian to pause, looking over in the direction of the footsteps. It's hard to see much past the bars... It annoys him (ugh, what he'd give for some actually useful tools around here), but he's not too worried. The bars were an advantage in case whoever was on the other side happened to be an idiot, and he remembered exactly where he came from, so he could make a quick escape if necessary.

...unless it was a worm. That might be a bit more difficult. But he doesn't think it's going to be a worm, especially not when the other side goes silent. Damian makes a face, but he decides that he's not interested in making small talk—he's got other concerns, like finding a way past this area, so he just goes back to investigating instead. He's still mindful of the other's presence, but he's preoccupied at the moment.