Another critical moment of the film was the meeting in which President Harry S. Truman called Oppenheimer a "crybaby". Nolan wanted to convey the scene from Oppenheimer's perspective and felt it was a "massive moment of disillusion, a huge turning point [for Oppenheimer] in his approach to trying to deal with the consequences of what he'd been involved with", while also underscoring that it is a "huge shift in perception about the reality of Oppenheimer's perception". He wanted to execute a quick tonal shift after the atomic bombings of Hiroshima and Nagasaki, desiring to go from the "highest triumphalism, the highest high, to the lowest low in the shortest amount of screen time possible". For the ending, Nolan chose to make it intentionally vague to be open to interpretation and refrained from being didactic or conveying specific messages in his work. However, he did have the intention to present a "strong set of troubling reverberations at the end".