He's human. Customers are frustrating as all get-out; you want to do the very best by them; and your best is NEVER good enough. Chances of this happening anywhe

He's human. Customers are frustrating as all get-out; you want to do the very best by them; and your best is NEVER good enough. Chances of this happening anywhere is non-zero, and there is no indication this incident has a frequency, so you can't really reduce it. Not to mention, it's pretty probable that he has learned his lesson and thus decreased the frequency of such incidents, but we won't know until, at least, the third time.