"The movements might trigger something very old, an anger or a deep sadness," the therapist explained.

The slightest movement, the faintest sound would trigger the old bull into flight.

As she had expected, the movement triggered them, and the nearer bent forward slightly, her eyes opening.

He knew that the slightest movement must trigger the shot.

For a while, he was reluctant to move, afraid that movement would trigger another event, the same or worse.

My movement hadn't triggered the swarm to pursue me.

Afterwards, Mark was never able to say just whose sudden movement had triggered the outbreak of the fight.

Any movement on his part, he knew, would trigger Giordino into instantaneous action.

That cat moved slowly as well; perhaps rapid movement would also trigger their interest.

The viewer's movement within the space triggered the images to change.