I said to a librarian, "Thank you - very much."
And his sidekick mimicked me.
Duh?
Obviously I'm doing it wrong - *again*!
Don't ask why I said it that way, I have no idea.
Maybe it worked somewhere. Thing is, there are probably a zillion ways to thank people and if one of them works, I use it everywhere, which makes me wrong most of the time.
And who did the sidekick think they were to mimic you like that? I think that that was very rude of them. Are they perfect? Do they never act awkward or make mistakes?