What is the speaker referring to when they say "I was smart once"?
Nothing that stupid.... Really nothing that stupid...  One mistake on a number.   Nothing that stupid.   Have you ever been smart?  Beats me.   I was smart once,  really smart,  I threw you and yours out of this house.   Quickly.  Without question.   U have never been back since, and never will.. That is being smart.  That is being very very very smart.