The know-it-all customer was loud and persistent, and didn’t appear to have any point to his rant other than to impress upon everyone how Very Clever he was…
With a customer who physically threatens you, there is only one appropriate action, and that is to remove yourself from the situation immediately. Don’t explain yourself; don’t threaten back; simply say, “excuse me,” and leave.
Customer service is getting harder. There is an insidious perfect storm brewing in our relationship with our customers. It has been sneaking up on us for a while, and most organizations are already experiencing the effects without realizing the cause.