Discipline

A friend of mine from college days did his National Service in the Royal Air Force. He had a degree in Chemistry and Mathematics and there in the air force he became a sergeant in the Education Section.
His first task was to lecture to a class of young men all of whom were Officer Cadets. They being of the officer group (or soon to be) were considered a notch (i.e. class) above what he was - Non-Commissioned Officer.
He started to deliver his lecture when some tittering broke out, then some whispered remarks, then some laughter. He didn't know exactly what it had to do with but guessed it might have had something to do with his Welsh accent.
Somehow he got through the lecture but he immediately went to see the head of the unit (brigade or whatever they call it in the RAF), a Wing Commander possibly - someone fairly high up the officer ranks.
He told the officer what had happened and said he would not be able to carry on with his lecturing under these circumstances.
The officer said; "Go to the next lecture and carry on as if nothing had happened."
"But sir...."
"Leave it to me," said the senior officer.
"Yes sir."
The next lecture time arrived and my friend went into the room and stood there about to start. There was the usual tittering, whispering etc.
Then the door opened and in came the senior officer he had spoken to.
He stood there at the back of the room and told my friend to continue please.
Silence.
The man remained standing there until the end of the lecture. He said not a word to the officer cadets who were silent throughout, listening attentively and taking notes.
At the end he walked out.
My friend told me he never had any trouble with that class again.