The two forms became intermingled as they struggled and writhed at the brink; then, with the slowness of a great tree that has been cut through at the root, they toppled into the Chasm and disappeared.
Neal Stephenson
The two forms became intermingled as they struggled and writhed at the brink; then, with the slowness of a great tree that has been cut through at the root, they toppled into the Chasm and disappeared.