I had a similar experince to 13. I work at a fast food place and this guy wanted a combo 5 but with nothing to drink so I told him that if he didn't want a drink it would actually be cheaper to just get the two items separately, but he insisted on getting the combo and later called in a complaint that I was trying to make him look stupid in front of other customers. Ever since then I just give people what they ask for.
Working at a hotel, some of our TV's have very tight power cords that will unplug if the TV is moved too far in either direction. It was a pretty common thing that is very easy to fix. A guest calls down complaining that his TV isn't turning on. I told him it was probably the power cord and to check if it was plugged into the back of the TV. He then noted that he was an engineer and he knows how a TV works. I walked up to the room, and the guest was visibly irate and telling me that he works on satellites and knows this stuff. I calmly reached behind the TV and reinterested the power cord. "Oh...well...you mean THE power cord. I knew that."
Once, I went to subway.
When I was at Subway they asked me how long I wanted my sandwich. So I asked how long a foot was( I use the metric system). The guy at the counter looked at me and said "It's a foot long."
I didn't know how else to word it so I said, "But how big is it?" He looked at again and said "It's a foot long." I said, "But how large is it?" He grabbed the bread, put it front of my face and said "IT'S A FOOT LONG!"
http://www.slice.ca/breaktime/photos/35-heartwarming-photos-that-will-restore-your-faith-in-humanity/#!a9a7889997cb0dfe74fb2c0d635af38e
When I was at Subway they asked me how long I wanted my sandwich. So I asked how long a foot was( I use the metric system). The guy at the counter looked at me and said "It's a foot long."
I didn't know how else to word it so I said, "But how big is it?" He looked at again and said "It's a foot long." I said, "But how large is it?" He grabbed the bread, put it front of my face and said "IT'S A FOOT LONG!"