You can always tell a Marine...

Rico says his friend Dave Kitterman, the son of a former Marine, sends along this one:

A former Marine sergeant, having served his time with the Corps, retired and took a new job as a school teacher but, just before the school year started, he injured his back. He was required to wear a plaster cast around the upper part of his body. Fortunately, the cast fit under his shirt and wasn't noticeable.
On the first day of class, he found himself assigned to the toughest students in the school. The smart-alecky punks, having already heard the new teacher was a former Marine, were leery of him and decided to see how tough he really was before trying any pranks. 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 promptly stapled the tie to his chest.
Dead silence.....
He had no trouble with discipline that year.

Rico says it's reminiscent of the time he fell out of a tree and went into grade school wearing a similar body cast. He took one punch from the class bully, and that ended that... (Until they figured out the trick, of course.)