Rivers stop constantly. They pool behind fallen trees, spread sideways across flat ground, go underground for a mile and surface somewhere nobody expected.
What they never do is agree to stay stopped.
That is the honest shape of an unstoppable thing. Not constant motion — a refusal to be permanently absorbed by any one obstacle. Interruption is part of the design rather than a failure of it.
If this has been a pooling month, that is still the river doing what rivers do.