When I was still working, I was on the phone a lot with clients and factory reps from the company I worked for. One of the reps that was assigned to me was a very trying individual by the name of Arnold. He had been exceptionally obnoxious to me one day, and I was literally fuming when I got off the phone with him, and I was voicing my displeasure of the conversation to my cubical partner. As I was ranting and raving to her about Arnold, my phone rang and I promptly picked it up and answered with my intentional usual greeting of "This is Ellie - how can I help you?" - but instead it came out as "This is Arnold - how can I help you?" I immediately burst into gales of laughter at my blooper, and then went on to explain to my customer on the end of the line, why I said that. Fortunately it was one that I had a good working relationship with, and not Arnold calling back!