"An escape tunnel. One of our Diamond Dog member helped dig it out while setting it to collapse once we pull the right supports out at the end. I'd hate to collapse it on any living being, even a Changeling, but we needed to make sure they can't follow us, it'd be too risky having you fall back in their hooves," Captain Shield explained, his voice carrying the tone of urgency that indicated you had to keep moving soon, or you'd risk being in further trouble.