The time he got kicked out of his 6th grade english class (68 years ago):

His hyper strict teacher noticed the little note he had just deposited on his friend's desk. She marched right over and read it aloud, in hopes of humiliating him.

Inside the folded note was a limarick:

"There once was a girl from Warwick
whose puss was phantasmagoric.
The king fell in,
everyone chipped in
and out came the Earl of Yorrick"

The teacher angrily told him he was a horrid boy.

In response, he stood up and levelly said:

"There once was an old teacher named Flynn
who thought touching a man was a sin.
She put a great latch
right over her snatch,
and nobody could ever get in."

The teacher froze for a moment, then pointed and said "Out!".

Later the principle asked him to repeat exactly what had led to his getting kicked out of class...

Given that this guy at 80 is sharp, mischievous, and spirited, I have no doubt that he was probably a complete handful for his teachers at 12.