This is 100% true and just happened minutes ago.
Guy comes in asking about umbrellas. Picks one out, it's $10 and asks for a discount.
I flat out say no. He keeps on asking, I say no.
He then lectures me about how I'm bad at business, I'm going to lose his money, that this is all part of negotiating.
We continue to argue for like 5 minutes and at this point I was getting fed up so swore twice.
He gets pissed and starts saying "you can't swear at me", "karma will get me", "I've got aggression problems" blah blah.
And I tell him that the language I use isn't indicative of whether or not someone is a good person, the basis of karma.
He replies back "no this is based on what Buddha says".
We keep arguing with me telling him to just leave already.
He then says, "you know what I really want to get one of these umbrellas and hit you with it". I start clapping and saying "oh yeah Buddha will really like that".
We keep arguing. He finally ends up leaving. I say have a good day, walk off, then 3 seconds later I hear
"**** you!"