Seth is chastised by Daniel's words, but then they're all a bit distracted by how easily that chain got tugged out from the wall, and he forgets his annoyance. Even though Peter does a pretty good job of reminding him.

He grabs hold of the chain with one hand, and then with the other once Peter gets close enough, and braces his foot against the wall. This one is a bit more stuck than the first one, but eventually it comes out as well, and Seth stumbles back, spitting a bit at the sudden stone dust in his face.