Australian regiment

[Blackal]

A former Sergeant Major in the Royal Australian Regiment took a new job as a high school teacher in the rough western suburbs of Melbourne. Just before the school year started, he injured his back. He was required to wear a thin plaster cast around the upper part of his body. Fortunately, the cast fitted under his shirt and wasn't noticeable.
On the first day of class, he found himself assigned to the toughest students in the toughest school. The smart-aleck punks heard the new teacher was a former Army NCO, and he knew they would be testing his discipline in the classroom.Walking confidently into the rowdy classroom, the new teacher opened the window wide and sat down at his desk, when a strong breeze made his tie flap, he picked up a stapler and stapled the tie to his chest.
Dead silence.
The rest of the year went very smoothly.