human
Please generate a brief description of a risky scene outside a sea cave with a tunnel and debris in the water.
assistant
The deep water rushes wildly between the craggy walls rising to either side. High above, the bridge arches over the chasm, its underside dimly lit. Water splashes high up the wall as it tumbles through, bashing against the rough stone. Debris in the water, propelled by the swift current, strikes swimmers with great force. The swirling waters drain out through a low tunnel in the wall. A strange luminescence glows faintly from under the water.