To unexpectedly -- and spectacularly -- destroy your career in a single act so obviously wrong that having someone tell you "you should know better" would be blatantlyredundant
A married, government official, who gets caught administering substantial amounts of money to have sex with a prostitute(s) over the course of many months/years well aware how wrong it is and the consequences.
I hope one day when I become governor of New York I do not become a spitzer, and if I do, I hope I do not have a coach sleezy happen to me.