This incarnation of the Doctor was deeply affected by his actions in the Last Great Time War. He hid his sorrow with a facade of manic energy and a sharp, offbeat wit. Nevertheless the weight of destroying the Time Lords and the Daleks preyed upon him, creating an emotional incarnation of great sorrow and anger. This incarnation was sometimes emotionally exhausted and would break down when faced with pain, suffering, or death. This once resulted in a moment of joy and relief when he realised that he could, for once, reverse the pain and suffering he had encountered, whooping, "Just this once - everybody lives!!"