As you descend, you feel the walls painfully raking into you. Puzzled, you look closer at your surroundings and realize, to your horror, that the walls are lined with upturned blades jutting diagonally outward. You reason that you only felt slight cuts on your ascent because of the angle at which they had been placed. In ascending, you were grazing against the dull part of the blades, but now find yourself descending right onto their sharp side. This causes you great concern, but thankfully you are close enough to the ground that you simply jump down from your position, avoiding the blades entirely.
Landing on the floor, you stand up in some degree of discomfort, but are thankful you did not ascend further. One other possible route remains.