history: I was shopping the other day and was convinced the cashier had over charged me. I confronted her and finally asked to speak to a manager because I did not feel that I was getting any response. The manager proved to me that I was wrong. I confronted a cashier the other day about over charging me but it turns out that I was wrong.  Ouch!  That had to feel embarrassing!  Did you apologize?
current: I did profusely!  
next: That's good.  That shows your true character.