human
Compose a short description of a dangerous scene outside a canyon with a boulder blocking the road.
assistant
The distance between the surrounding hills is narrower and the gentleness of the slope disappears, exchanged for high bluffs on either side. The result of this geographical change is that the pleasant countryside is now a narrow canyon overshadowed by enormous rock formations. A huge boulder has crashed down on the roadway and blocks access through the canyon at this point.