Speaking of mistakes, I was in the liquor store the other day to buy a bottle, and there was some kid at the counter. I asked, "Are you in line?" and he sort of stepped aside and said "go ahead". So I got my bottle, handed the proprietor two fives, he rang it up, put it in the register, and asked for another $1.77 or something. I was confused - "What? You can't make change out of the till?" And some minor discussion ensued, and the guy realized that I had given him two fives, not a five and a one, and he was just mortified - "Oh, I make mistake! So sorry!"
I said, "Oh, a mistake. No big deal, everybody makes mistakes - that's how we learn stuff. :-)" The guy counted out the correct change, and all was well.
On the way out the door, the kid that had been standing watching the whole transaction said, "Yeah, I learned something here too."
It made me feel good.
Cheers! Rich