<human>: Ten years ago, during my brief tenure as a Blockbuster employee, I was left alone to run a store on a Friday, one week before Christmas.  It was snowing and our credit card machine was down.  It was extremely busy (yes, there was a time that people went to Blockbuster) and I had a line reaching halfway through the store.  A lady comes to my counter wanting to buy used VHS tapes as gifts for her daughter.  (On a side note, she asked me if I thought Skulls 2 on VHS was a good movie to buy for her 16 year old daughter, and wasn't sure if she had seen the first one. WTF?!?!)  

Anyways, she wanted to use a credit card and I told her the machine just went down and we'd have to use cash or she would need to wait a minute until it came back up.  She went crazy and grabbed the scissors in my work area and cut her membership card into pieces to promptly throw in my face. With bits of paper trickling down my face and chest, I calmly apologized, trying to calm the situation down and she starts storming out. The people in line were horrified at her response.  Just as the exit door closed, I called her back in and she turned around almost optimistic that the credit card machine had come back around.  I prompted her to walk around the counter and said to her, "You forgot your card."  She was livid and stormed out cursing.  The people in line were cracking up.  I felt pretty good about that one.  

I'd like to hear some other stories.

Condense the text into a few key points
<bot>: Some lady got pissed about not being able to pay with credit, cut up card and threw it at me.  I had a moderately funny response.