Williams apologized and admitted that he had a lot of pent up anger after Woods terminated their partnership.

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In January 2011, years of pent-up anger and frustration erupted across North Africa and the Middle East.

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There was pent-up anger among people who felt economically and politically marginalised and this found an outlet in newly created local-language radio.

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The pent-up anger vented on the streets of Urumqi was chaotic, ignited by reports of the deaths of at least two Uighur toy-factory workers after they had been falsely accused of rape.

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He unloaded "pent-up anger" that had built up over time -- against Savio and her family, the legal process, the media, even a TV movie about the case, according to his attorneys and the prosecutor.

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Wes Wilhite, the company commander, says he knows a lot of his soldiers have "some form of pent-up anger in them, but at the same time they are trained" to deal with the loss of comrades.

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