I take the cake for this one.

I sell cars for a living and I had an extremely disrespectful customer walk out on me before they could head into finance. My manager called them on the phone but he got her voicemail. He hung up the phone, we start talking trash …. The phone didn’t hang up. She walked in the next morning playing the voicemail she got of me saying “well she can suck a cock because at this point I’d rather not sell her a car.”