Just thought of something.
In Sentimental Swordsman, Shangguan Jinhong wanted to test the true power of Dagger Li's dagger, so he purposely triggered Li to throw a dagger at him, killing him.
In World War 2, Japan wanted to test the true power of USA, so it prvoked USA by dropping a bomb there, only to be bombed by it in return on a higher magnitude.
Random thought of the day?