One day when Nasreddin was having his regular daily coffee at his usual seat in his usual outdoor café, a schoolboy came along and knocked off his turban. Unperturbed, Nasreddin picked up the turban and put it back on his head. The next day, the same schoolboy came along and knocked off his turban again. Again, Nasreddin just picked it up, put it back on and resumed whatever conversation he was having. When the little brat repeated the prank for the third time, his friends protested and told him to scold the boy.
"Tsk, tsk. That's not how this principle is working," said Nasreddin offhandedly.
The next day, an invading army occupied the city and Nasreddin did not turn up for coffee as usual. In his seat was a captain from the invading army. When the schoolboy passed by as usual, he knocked off the soldier's hat without a second thought and the captain sliced off his head with a swift single stroke of his sword.[