NaN Not A Number. On the contrary that is something that inflames us, that increases our enthusiasm. At such time he not only spoke confusedly and disconnectedly, but occasionally made jests of a nature which one did not expect of him, indeed he even deliberately forgot himself in his behaviourx02026. Then he proceeded to Italy. Although Mozart has been described to easily switch from serious and impulsive to jolly and rowdy mood, some have suggested that the various accounts of his eccentric behaviour have been exaggerated and his impulsiveness was merely a personality trait rather than a psychiatric disorder. Slow down and enjoy it.