This blunt assertion of firepower may have served as a warning to Iran as well as an object lesson to Saudi Arabia's own restive Shia minority of 10%.
It's a terrible story, and clearly an object lesson for the rest of us. But an object lesson in what, exactly?
Managing her materials with deceptive ease and fluency, Ms Tomalin provides an object lesson in how to write a life.
Greece has become an object lesson for countries with overgrown deficits.
If you must hold yourself up to your children as an object lesson (which is not at all necessary), hold yourself up as a warning and not as an example.
For better than five years,Scampy gave us an object lesson in courage,demonstrating what it means to do your best with what you've got.
Just look at the Task Force as an object lesson.
Let this accident be an object lesson in the dangers of drinking and driving.
Their faultless performance was an object lesson in how to dance the tango.