and as the other cell doors swung open and inmates filed out to make their way to the yard , bunnu now envisioned them : these surly gray fibrous masses beyond his door , in the spaces between walls , trolling the depths of the building itselfhunched , faceless amalgamations of loosely-configured men , leaking abrasive matter upon the hard surface of the floors when even the slightest breeze whistled through their cavernous bristled epidermis .