It was a house of cards, unstable against small disturbances.

A key feature of positive feedback is thus that small disturbances get bigger.

There was a small disturbance in the air beside me; a ruffling of feathers.

He was often aroused by small disturbances or sounds which would not have bothered him a few years before.

This small disturbance did not deflect them for long.

He considered small disturbances from a flat space-time, which is appropriate for the waves likely to reach Earth.

A word of his own, humorous, acquiescing to some small disturbance in my mind.

There was a small disturbance off to his left, and it brought him about.

Hence a small disturbance will speedily cause death in old age.

This helped transform a small disturbance into a full-blown campaign.