Only then did Gregory remember the tire iron in his hand and realize the apparent provocation this presented to the thug before him.

Without warning or apparent provocation, he hurled himself on Big Boss.

"Without any apparent provocation," the judge wrote, the police charged the crowd of demonstrators.

She told them he would rant and howl without apparent provocation.

The gunman in the latest killing fired without warning or apparent provocation and escaped.

It may explode, sometimes even without apparent provocation, and is therefore too sensitive to be used commercially except when in solution.

But then, just ten kilometres away from my destination, it stopped, with no apparent provocation or warning.

Without apparent provocation, she began screaming at him, before suddenly becoming silent and staring into space.

Witnesses said the officer had acted without apparent provocation.

Dad has teared up before, usually with no apparent provocation.