Gordon Brown has denied ever hitting anyone amid claims in a new book that he was abusive to members of his staff.
The Prime Minister was forced to deny allegations of bullying in Downing Street after he launched Labour's new slogan: "A Future Fair For All."
He insisted that when he got angry it was mostly with himself and while he might throw papers to the floor, he was never violent with staff.
But he did admit that sometimes things get said "in the heat of the moment."
Brown has been hit by a series of claims in books by former Labour insiders that he operates a "reign of terror" in Downing Street.
This weekend, the Observer is serializing extracts from a new volume by its chief political commentator Andrew Rawnsley.
It has been reported that among alleged incidents investigated by the journalist were that Brown shoved a senior adviser.
He is also said to have hit the back of a car passenger seat so hard that the protection officer sitting in front "flinched with shock."
The book also claims he used a highly-derogatory four-letter word in a rant at aides during a trip to the United States.
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