"Here give me that baby?"
He would always hum the lullaby of a baby sleeping after he elbowed his way into someone else's work and that happened just before he made catastrophic mistakes.
As if to say it is so simple even a baby could do it?
Or maybe to want to be the person that has the quiet and professional mind without actually achieving it? "Dee deedely dee, deedely dee deedely dee dee dee. There is a sense of sadness in the character but you dare not speak of it or you get a mallet equivalent to the head?
And we do learn from watching their fallibility. But what if you were a person that others were learning from while they were taking your job and humming in your ear at the same time? It wouldn't be so funny would it?