"Long ago, in the dark age of Greece, there was a great army that was led by a mad and foolish general.
During a charge on what was thought to be an enemy army, was in fact a painted on curtain in which behind it was a cliff leading to a deep pit.
The general charged his men into the cloth until he and all but one stopped before falling to his death.
To remove himself from the stupidity of his comrades, he adopted the name "Stoppable"
"And you got an A?" Kim questioned.
"Yup" Ron replied.
"Thanks, Government Education"