QFT!
I had a similar incident. The usual problem- no refill on a control, on the weekend. All I said to this man was "I'm sorry, but there are no refills left on this prescription. We'll have to call your doctor on Monday for additional refills". This particular customer was so put out that he threw the bottle IN MY FACE ( it bounced off my cheek, just missing my eye!) and proceeded to throw the mother of all hissy fits. The store manager on duty was all set to give this "gentleman" a gift card to placate him, and would have done if my PIC hadn't stepped in and stopped him. In the end- my PIC basically told this guy that it probably would be better for all concerned if he took his business elsewhere. Believe me- I wasn't sorry to see him leave!
( The manager still wanted to write me up- my PIC had to explain to said ***** that having my eye put out was not something that came under the scope of customer service!?)
Retail- gotta love it sometimes!