Jack cut by stalactites

Akiko pushed off down the tunnel, Jack following close behind.
He found himself quickly picking up speed as the incline steepened. The tunnel twisted and turned through terrifying blackness. All he could hear was the rush of wind and the gush of running water.
Something hard and brittle whipped into his face, shattering on impact. He felt the warm wetness of blood run down his cheek. Then he remembered the shark-toothed stalactites he’d seen at the lake and lay flat in the hope he would be lucky enough to avoid the razor-sharp shards of rock.
- Young Samurai: The Way of Fire